Претрага
589 items
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Rockfall simulation on a rock slope along E75 road at km 890+725 to 891-093
Abolmasov Biljana, Marjanović Miloš, Milenković Svetozar, Pejić Marko, Berisavljević Zoran. "Rockfall simulation on a rock slope along E75 road at km 890+725 to 891-093" in Proceedings of the 16th Danube-European Conference on Geotechnical Engineering-Geotechnical hazards and risks: Experiences and practices, Skopje, Republic of Macedonia 1, :Willey Ernst and Sons (2018): 269-274
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Assessment of landslide-related hazard and risk on the road network of the Valjevo city, Serbia
Marjanović Miloš, Abolmasov Biljana, Đurić Uroš, Krušić Jelka. "Assessment of landslide-related hazard and risk on the road network of the Valjevo city, Serbia" in Proceedings of the 16th Danube-European Conference on Geotechnical Engineering-Geotechnical hazards and risks: Experiences and practices, Skopje, Republic of Macedonia 1, :Willey Ernst and Sons (2018): 365-370
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Утицај соларне активности на здравље човека
... Environment. Scientific rep., 8, 2663. [2] Vencloviene, J., Babarskiene, R. et al. (2013). The Effect of Solar-Geomagnetic Activity During Hospital Admission on the Prognosis of Cardiovascular Outcomes in Patients with Myocardial Infarction. British J. of Medicine & Medical Research, 3(4), 1587-1597. ...
... et al. (2012). Potential effects of solar and geomagnetic variability on terrestrial biological systems. Research Signpost, 329-376. [8] Perić, J. (2010). Propusna svojstva naočara za zaštitu od Sunca u UV oblasti. Diplomski rad. Novi Sad: Prirodno-matematički fakultet, Univerzitet u Novom Sadu ...
... (2010). Mechanisms of Geomagnetic Field Influence on Gene Expression Using Influenza as a Model System: Basics of Physical Epidemiology. International J. Environmental Research and Public Health, 7, 938-965. [11] Gordon, C., Berk, M. (2003). The effect of geomagnetic storms on suicide. South African ...Каролина Ђукић, Весна Цветков, Весна Дамњановић. "Утицај соларне активности на здравље човека" in VII Меморијални научни скуп из заштите животне средине доцент др Милена Далмација Нови Сад, 01-02. април 2019, Природно-математички факултет, Департман за хемију, биохемију и заштиту животне средине (2019)
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Terminological and lexical resources used to provide open multilingual educational resources
Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...... ENLP tutorial held at AIED 2009 in Brighton, Jul, 2009. [2] J. M. Balkin and J. Sonnevend, “Digital Transformation of Education (April 4, 2016),” in Education and Social Media: Toward a Digital Future, 2016, Forthcoming, C. Greenhow, J. Sonnevend and C. Agur, Ed. Cambridge, MA: MIT Press, 2016, ...
... T. M. Cabré Castellví, Terminology: Theory, Methods, and Applications. Amsterdam: John Benjamins, 1999, pp. 115. [5] I. Obradović, R. Stanković, J. Prodanović and O. Kitanović, “A TEL platform blending academic and entrepreneurial knowledge,” in Proc. 4 th Conference on e- Learning, 2013, pp ...
... Berlin Heidelberg, 2001, pp. 36-46. [13] K. Heylen and D. De Hertog “Automatic Term Extraction,” in Handbook of Terminology, 2nd ed., vol. 1, H. J. Kockaert and F. Steurs, Ed. Amsterdam: John Benjamins, 1964, pp. 203–221. [14] A. Oliver and M. Vàzquez, “TBXTools: A Free, Fast and Flexible Tool ...Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić. "Terminological and lexical resources used to provide open multilingual educational resources" in The Seventh International Conference on eLearning (eLearning-2016), 29-30 September 2016, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2016)
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Palaeoflora of Kamenica (Pranjani Basin, western Serbia)
Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...... Belgrade, 147pp. LaZarevIć, Z. & MILIvOjevIć, j. 2010. early Miocene flora of the intramontane Žagubica Basin (Serbian carpatho- Balkanides). Neues Jahrbruch für Geologie und Paläon- tologie, Abhandlungen, 256: 141–150. LaZarevIć, Z., MILIvOjevIć, j., BOGIćevIć, K. & NeNadIć, d. 2013. early Miocene ...
... education, Science and Technologi- cal development of the republic of Serbia, Projects No. 176015, No. 33003 and No. 176016. References aNđeLKOvIć, j. 1989.Smerdis minutus (Blanville) from the Oligocene of Pranjani basin, western Serbia. Geološki anali Balkanskoga poluostrva, 53: 301–304. đOrđev ...
... (Western Serbia). Neues Jahrbruch für Geologie und Paläontologie, Abhandlungen, 267: 297–307. MarOvIć, M., TOLjIć, M., ruNdIć, Lj. & MILIvOjevIć, j. 2007. Neoalpine Tectonics of Serbia. Serbian Geological So- ciety, 87pp. MIhajLOvIć, đ. 1985. Palaeogene fossil flora of Serbia. Ge- ološki anali ...Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević . "Palaeoflora of Kamenica (Pranjani Basin, western Serbia)" in Geološki anali Balkanskog poluostrva, Beograd : Rudarsko-geološki fakultet (2019). https://doi.org/10.2298/GABP1902053L
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Primena termografije u rudarstvu
Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić (2019)Danas, gotovo da nema oblasti u nauci i tehnici u kojoj se Infracrvena termografija ne primenjuje kao metoda za lociranje i praćenje zagrejanih objekata ili tela, beskontaktnu procenu temperature površina, i nedestruktivno ispitivanje materijala. U radu su prikazane mogućnosti i perspektive primene ove metode u oblasti rudarstva.... Drebenstedt C., Zhao J., Environmental influences and extinguish technology of spontaneous combustion of coal gangue heap of Baijigou coal mine in China. 4th International Conference on Energy and Environmental Research, ICEER 2017, Energy Procedia 136, pp 66-72, 2017. [11] Pandey J., Kumar D., Singh ...
... field obtained by pulsed radiometric defectoscopy. Measurement, Vol. 46, 2263-2268, 2013. [6] Lahiri B., Bagavathiappan S., Jayakumar T., Philip J., Medical applications of infrared thermography. Infrared Phys. And Tech., Vol. 55, Issue 4, pp. 221-235, 2012. [7] Mineo S., Calcaterra D., Zampelli ...
... Infrared Thermography for the survey of intensely jointed rock slopes. Società Geologica Italiana, Vol. 35, pp. 212-215, 2015. [8] Tattersall G. J., Infrared thermography: A non-invasive window into thermal physiology. Comp. Biochem Physiol A Mol Integr Physiol., 202, pp. 78-98, 2016. [9] InfraTec ...Stevan Đenadić, Vesna Damnjanović, Predrag Jovančić, Dragan Ignjatović, Dragutin Jovković, Filip Miletić. "Primena termografije u rudarstvu" in IX Međunarodna konferencija UGALJ 2019, Zlatibor, Srbija, 23-26. oktobar 2019., Jugoslovenski komitet za površinsku eksploataciju (2019)
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Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)
Miloš Radonjić (2020)This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides... of this work. REFERENCES BÁBEK, O., MIKUÁŠ, R., ZAPLETAL, J. & LEHOTSKÝ, T. (2004): Combined tec- tonic-sediment supply-driven cycles in a Lower Carboniferous deep-marine fore- land basin, Moravice Formation, Czech Republic.– Int. J. Earth Sci., 93/2, 241–261. doi: 10.1007/s00531-004-0388-5 ...
... MULDER, T., SYVITSKI, J.P.M., MIGEON, S., FAUGÈRES, J.-C. & SAVOY, B. (2003): Marine hyperpycnal flows: initiation, behavior and related deposits. A review.– Ma- rine and Petroleum Geology, 20, 861–882. doi: 10.1016/j.marpetgeo.2003.01.003 MUSZER, J. (2020): trace fossils from the Mississippian of the ...
... SREMAC, J. (2012): Influence of terrestrial sedimentation in Pennsylvanian rocks of Cro- atia.– Geologia Croatica, 65/3, 273–282. doi: 104154/gc.2012.18 STOW, D.A.V. (2005): Sedimentary Rocks in the Field: A Colour Guide.– Manson Pub- lishing Ltd., London, 205 p. doi: 10.1201/b15204 STPANEK, J. & GEYER ...Miloš Radonjić. "Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)" in Geologia Croatica, Croatian Geological Survey (2020). https://doi.org/10.4154/gc.2020.13
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Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation
The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...... Champigny/Marne Ball J, Young ME (2000) A Simple technique for rapid assessment of stone decay on buildings. In: Fassina V (ed) Proceedings of the 9th International congress on deterioration and conservation of Stone, Vol 2. Elsevier, Amsterdam, pp 13—17 Delgado Rodrigues J, Ferreira Pinto A P ...
... cultural heritage. Butterworth-Heinemann, Oxford, pp 859-862 McCabe S, Smith B J, Warke P A (2007) An holistic approach to the assessment of stone decay: Bonamargy Friary, Northern Ireland. In: Pirikryl R, Smith B J (ed) Building stone decay: from diagnosis to conservation. Geological society ...
... preduzece “Beogradska tvrdjava”, Belgrade (in Serbian) Rothert E, Eggers T, Cassar J et al (2007) Stone properties and weathering induced by salt crystallization of maltese globigerina limestone. In: Prikry1 R, Smith B J (ed) Building stone decay: from diagnosis to conservation. Geological society ...Maja Franković, Nevenka Novaković, Vesna Matović. "Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation" in Environmental Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s12665-014-3843-z
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Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије
Nebojša B. Atanacković (2018-08-31)Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе... al. 2013): 1 1 1 1 1 1 1 ( ) 2 0 j j j j xj j j j j j j j t a d a d t t a d t a d d t a d [11] 1 1 1 1 1 0 2 1( ) 2 0 jk j jk j jk j jk j j jk j jk jxjk jk j jk j jk j j jk j t a d t a d a d t a d d a d t a dt a d t a ...
... Li et al. (2013) наводи да се функција припадности одређује на основу следећих једначина: 1 1 1 1 1 1 1 1 1 1 1 0 ( ) 2 1 j j j j xj j j j j j j j t a d t a d t a d t a d d t a d [14] 1 1 1 1 1 1 1 1 1 0 2 1( ) 2 0 jk jk jk jk ...
... [12] 1 1 1 1 1 0 ( ) 2 1 jp j jn j xjp jp j jp j j jp j t a d t a d t a d t a d d t a d [13] где је t вредност фактора; k = 1,2,…,K-1; и j= 1, 2,…, m. На овај начин одређене су функције припадности за ...Nebojša B. Atanacković. "Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-08-31)
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Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia
Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić (2022)The paper compares the flow regimes of the Resava River at the gauging stations of the Manasija Monastery (upper course) and the town of Svilajnac (lower course). The hydrological analysis encompasses a multiyear period of monitoring (1982–2020). The water budget and baseflow index are assessed for the catchment areas monitored by the Svilajnac station (683 km2) and the Manasija Monastery station (358k m2), considering the overall monitoring period and characteristic years. The results indicate that the specific runoff in ...... years, when the mean annual discharge was Š L Š . er\ o% H a s |y FNN| FEJ šoo[ - }ž ŽZO i š E 20 L 10 % j | 5 s t-] 5 Š 5 t |3 5 5 t-i Š k k - - -j |j k_ -i -j -i -i e E SBSBSSBS BBB R B B G B BBB a dii 0 š . a bvu.ž·ižšjžrgozn |—g.s. at Manasija Monastery —-g:5. at Svilajnac |—C-g5 ...Marina Mitrašinović, Vesna Ristić Vakanjac, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Dušan Polomčić. "Karst aquifer impact on the formation of surface runoff: case study of the Resava River catchment, Serbia" in National Conference with International Participation “GEOSCIENCES 2022”, Sofia : Bulgarian geological society (2022)
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Fuzzy model of a multigrade structure for support of decision-making and management in mineral processing
Vujić Slobodan, Miljanović Igor, Benović Tomo, Milutinović Aleksandar, Petrovski Aleksandar, Josipović Pejović Milena (2011)Vujić Slobodan, Miljanović Igor, Benović Tomo, Milutinović Aleksandar, Petrovski Aleksandar, Josipović Pejović Milena. "Fuzzy model of a multigrade structure for support of decision-making and management in mineral processing" in Proceedings of the 35th APCOM Symposium, Wollongong, Australia - no. -, Wollongong, Australia:University of Wollongong, Australia (2011): 485-490. https://doi.org/-
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Preliminary results of numerical modelling of debris flow - case study Leva reka, Serbia
Krušić Jelka, Samardžić Petrović Mileva, Marjanović Miloš, Abolmasov Biljana, Miljković Stevan (2018)Krušić Jelka, Samardžić Petrović Mileva, Marjanović Miloš, Abolmasov Biljana, Miljković Stevan. "Preliminary results of numerical modelling of debris flow - case study Leva reka, Serbia" in Proceedings of the 16th Danube-European Conference on Geotechnical Engineering-Geotechnical hazards and risks: Experiences and practices, Skopje, Republic of Macedonia 2, :Willey Ernst and Sons (2018): 707-712
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Diversity and biodeteriorative potential of fungal dwellers on ancient stone stela
Savković Željko, Unković Nikola, Stupar Miloš, Franković Maja, Jovanović Milena, Erić Suzana, Šarić Kristina, Stanković Slaviša, Dimkić Ivica, Vukojević Jelena, Ljaljević Grbić Milica (2016)Savković Željko, Unković Nikola, Stupar Miloš, Franković Maja, Jovanović Milena, Erić Suzana, Šarić Kristina, Stanković Slaviša, Dimkić Ivica, Vukojević Jelena, Ljaljević Grbić Milica. "Diversity and biodeteriorative potential of fungal dwellers on ancient stone stela" in International Biodeterioration & Biodegradation no. 115, Amsterdam, Netherlands :Elsevier (2016): 212-223. https://doi.org/http://dx.doi.org/10.1016/j.ib
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Geoloski profil planine Avale (severna Šumadija) - uvid u litostratigrafiju i tektonske strukture
Mezozojske formacije Šumadije dele tektonsko-stratigrafsku evoluciju južnijih delova suture jedinica Adrijskog i Evropskog afiniteta, uključujući gornjojursku obdukciju, krednu subdukciju i paleogenu kontinentalnu koliziju. Finalni rezultat dugovremene evolucije u geodinamički složenom ambijentu su komplikovani tektonski i litostratigrafski odnosi različitih mezozojskih formacija suture. Geološki profil kroz planinu Avalu omogućava uvid u skoro potpunu sukcesiju mezozojskih formacija i prostorne pozicije i kinematiku značajnih tektonskih struktura najsevernijih segmenata suture u Šumadiji. U tektonskom kontekstu, mezozojske formacije okoline Beograda najčešće su interpretirane kao deo Istočne ...Marinko Toljić, Bojan Glavaš-Trbić, Maja Maleš, Nikola Ranđelović. "Geoloski profil planine Avale (severna Šumadija) - uvid u litostratigrafiju i tektonske strukture" in 18. Kongres geologa Srbije "Geologija rešava probleme", Divčibare, 01-04 jun 2022. , Srpsko geološko društvo (2022)
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Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone
Aleksandar Luković (2021)Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...... 86(B11), 10431–10469. Dare, S. A. S., Barnes, S.-J., Beaudoin, G., Méric, J., Boutroy, E., & Potvin-Doucet, C., (2012): Trace elements in magnetite as petrogenetic indicators. Mineralium Deposita, 49(7), 785–796. Deer, W.A, Howie, R.A., Zussman, J., (1992): An Introduction to the Rock-Forming Minerals ...
... Final GEODE-ABCD Workshop, Abstract, Seggauberg, 28. Harrison, R. J., Redfern, S. A. T., (2001): Short- and long-range ordering in the ilmenite-hematite solid solution, Phys. Chem. Miner., 28, 399 – 412. Harrison, R. J., Stone, H. J., Redfern, S. A. T., (2006): Pressure dependence of Fe-Ti order in ...
... Neutron Scattering and Polarization by Ferromagnetic Materials. Physical Review, 84(5), 912–921. Sievwright, R. H., Wilkinson, J. J., O’Neill, H. S. C., & Berry, A. J., (2017): Thermodynamic controls on element partitioning between titanomagnetite and andesitic–dacitic silicate melts. Contributions ...Aleksandar Luković. Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone, Beograd : [A. Luković], 2021
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Polymorphism and photoluminescence properties of K3ErSi2O7
alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna strukturaPredrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović. "Polymorphism and photoluminescence properties of K3ErSi2O7" in Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography (IUCr) (2019). https://doi.org/10.1107/S2053229619011926
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Improving efficiency of thermal power plants through mine coal quality planning and control
Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja. "Improving efficiency of thermal power plants through mine coal quality planning and control" in Thermal Science, Vinča Institute of Nuclear Sciences (2018). https://doi.org/10.2298/TSCI170605209B
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Results of Laboratory geotechnical investigationsfor project of bridge at the Ada in Belgrade
Majstorović Jelena, Šubaranović Tomislav, Dimitrijević Bojan, Ilić Saša. "Results of Laboratory geotechnical investigationsfor project of bridge at the Ada in Belgrade" in Proceeding of the VIII International geomechanics Conference, 2-6 July 2018, International House of cientists „Fr. J. Curie“, Resort „St.St. Constantine and Elena“, Varna , Bulgaria, Varna , Bulgaria:Scientific and technical union of mining, geology and metalurgy & Federation of the scientific engineering unions in Bulgaria (2018)
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The thermal history of the Miocene Ibar Basin (Southern Serbia): new constraints from apatite and zircon fission track and vitrinite reflectance data
Andrić Nevena, Fügenschuh Bernhard, Životić Dragana, Cvetković Vladica. "The thermal history of the Miocene Ibar Basin (Southern Serbia): new constraints from apatite and zircon fission track and vitrinite reflectance data" in Geologica Carpatica Geologica Croatica 66 no. 1, :Geological Institute of Slovak Academy of Sciences (2015): 37-50. https://doi.org/10.1515/geoca-2015-0009
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Scanning Electron Microscopy Coupled with Energy Dispersive Spectrometric Analysis Reveals for the First Time Weddellite and Sylvite Crystals on the Surface of Involucral Bracts and Petals of two Xeranthemum L. (Compositae) Species
Milan Gavrilović, Suzana Erić, Petar Marin, Núria Garcia-Jacas, Alfonso Susanna, Pedja Janaćković (2017)Milan Gavrilović, Suzana Erić, Petar Marin, Núria Garcia-Jacas, Alfonso Susanna, Pedja Janaćković. "Scanning Electron Microscopy Coupled with Energy Dispersive Spectrometric Analysis Reveals for the First Time Weddellite and Sylvite Crystals on the Surface of Involucral Bracts and Petals of two Xeranthemum L. (Compositae) Species" in Microscopy and Microanalysis 23 no. 3, :Cambridge University Press (2017): 679-686