%0 Journal Article %A O. F. Men'shikh %T Functionally invariant solutions of a class of second-order partial differential equations %J Doklady Akademii Nauk %D 1972 %P 30-32 %V 205 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_205_1_a6/ %G ru %F DAN_1972_205_1_a6