%0 Journal Article %A R. V. Guseinov %T Smoothness of solutions of a class of quasi-elliptic equations %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1992 %P 10-14 %N 6 %U http://geodesic.mathdoc.fr/item/VMUMM_1992_6_a2/ %G ru %F VMUMM_1992_6_a2