%0 Journal Article %A N. I. Brisch %A N. J. Yurchuk %T The Goursat problem for abstract second order linear differential equations %J Differencialʹnye uravneniâ %D 1971 %P 1017-1030 %V 7 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_6_a8/ %G ru %F DE_1971_7_6_a8