%0 Journal Article %A A. A. Petrosyan %T Variational problem for some class of nonlinear pseudoparabolic operators %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2008 %P 24-33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2008_1_a3/ %G ru %F UZERU_2008_1_a3