%0 Journal Article %A G. I. Bykovtsev %A D. D. Ivlev %A Yu. M. Myasnyankin %T Relations on surfaces of discontinuity of stress in three-dimensional perfectly rigid-plastic solids %J Doklady Akademii Nauk %D 1967 %P 1039-1042 %V 177 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_177_5_a14/ %G ru %F DAN_1967_177_5_a14