%0 Journal Article %A A. Ya. Sagomonyan %T High-speed penetration of a solid sphere into the soil %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1997 %P 47-51 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1997_3_a11/ %G ru %F VMUMM_1997_3_a11