%0 Journal Article %A A. D. Myshkis %A A. M. Samoilenko %T Systems with shocks at prescribed instants of time %J Sbornik. Mathematics %D 1967 %P 187-193 %V 3 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1967_3_2_a2/ %G en %F SM_1967_3_2_a2