%0 Journal Article %A N. V. Kislov %T Boundary value problems for an equation of mixed type in a rectangular domain %J Doklady Akademii Nauk %D 1980 %P 26-30 %V 255 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_255_1_a4/ %G ru %F DAN_1980_255_1_a4