%0 Journal Article %A A. M. Nakhushev %T On the theory of boundary value problems for an equation of mixed hyperbolic-parabolic type %J Doklady Akademii Nauk %D 1977 %P 273-276 %V 235 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_235_2_a7/ %G ru %F DAN_1977_235_2_a7