@article{UZERU_2008_1_a3,
     author = {A. A. Petrosyan},
     title = {Variational problem for some class of nonlinear pseudoparabolic operators},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {24--33},
     publisher = {mathdoc},
     number = {1},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2008_1_a3/}
}