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The physical-mechanical characteristics of coal seams of immediate floor and roof influences on the choice of excavation system in the coal deposit in Serbia /unibl/sci/idNaucniRad:26822 622.274.5:622.33.013 (497.11) https://dx.doi.org/10.7251/afts.2020.1223.037T Academic Article text 2020-10 Ј. Триван, D. Tošić, В. Тодоровић, The physical-mechanical characteristics of coal seams of immediate floor and roof influences on the choice of excavation system in the coal deposit in Serbia, АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ, Vol. 5, No. 23, pp. 37 - 44, Oct, 2020 http://www.arhivzatehnickenauke.com/new/2020-godina/arhiv-br-23/rudarstvo/ 37 44 АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ 2233-0046 https://rf.unibl.org https://rf.unibl.org АРХИВ ЗА ТЕХНИЧКЕ НАУКЕ 2233-0046 https://www.unibl.org/sr-lat/fis/zaposlen/1442-jelena-trivan https://www.unibl.org/sr-lat/fis/zaposlen/1443-drazana-tosic /unibl/author/Vladimir Todorović 44 37 https://www.unibl.org/sr-lat/fis/zaposlen/1442-jelena-trivan https://www.unibl.org/sr-lat/fis/zaposlen/1443-drazana-tosic /unibl/author/Vladimir Todorović https://www.pub.unibl.org/s/cir/item/38061