%0 Journal Article %A O. A. Liskovets %T The hyperplane method in non-stationary problems with a self-conjugate operator %J Differencialʹnye uravneniâ %D 1965 %P 255-259 %V 1 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1965_1_2_a15/ %G ru %F DE_1965_1_2_a15