%0 Journal Article %A A. O. Vatulyan %A A. A. Lyapin %A E. L. Kossovich %T Studying of elastoplastic properties of coal specimens using indentation technique %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2018 %P 412-420 %V 18 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2018_18_4_a4/ %G en %F ISU_2018_18_4_a4