%0 Journal Article %A E. A. Grebenikov %A R. Sh. Shakibaliev %T The existence of asymptotic solutions of a certain class of partial differential equations %J Differencialʹnye uravneniâ %D 1975 %P 505-511 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_3_a9/ %G ru %F DE_1975_11_3_a9