%0 Journal Article %A M. G. Gasymov %T On the theory of high-order evolution equations %J Doklady Akademii Nauk %D 1972 %P 780-783 %V 206 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_206_4_a1/ %G ru %F DAN_1972_206_4_a1