%0 Journal Article %A D. U. Umbetzhanov %T On the construction of a multiperiodic solution of a certain system of partial differential equations with a common principal part %J Differencialʹnye uravneniâ %D 1972 %P 1326-1329 %V 8 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1972_8_7_a23/ %G ru %F DE_1972_8_7_a23