%0 Journal Article %A E. I. Moiseev %T Application of the method of the separation of variables for solving equations of mixed type %J Differencialʹnye uravneniâ %D 1990 %P 1160-1172 %V 26 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_7_a7/ %G ru %F DE_1990_26_7_a7