%0 Journal Article %A G. D. Karatoprakliev %T A certain boundary value problem for equations of mixed type in multidimensional regions %J Doklady Akademii Nauk %D 1969 %P 1223-1226 %V 188 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_188_6_a5/ %G ru %F DAN_1969_188_6_a5