%0 Journal Article %A Yu. A. Ryabov %A M. F. Korolev %T The construction of periodic solutions of certain linear and quasilinear equations %J Differencialʹnye uravneniâ %D 1975 %P 280-286 %V 11 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_2_a8/ %G ru %F DE_1975_11_2_a8