%0 Journal Article %A A. V. Kondrashkov %T Certain boundary value problems for a pseudoparabolic equation %J Differencialʹnye uravneniâ %D 1977 %P 90-99 %V 13 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1977_13_1_a12/ %G ru %F DE_1977_13_1_a12