%0 Journal Article %A G. D. Dachev %T Boundary value problems for a class of equations of mixed type %J Differencialʹnye uravneniâ %D 1982 %P 1894-1902 %V 18 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_11_a6/ %G ru %F DE_1982_18_11_a6