%0 Journal Article %A A. I. Yanushauskas %T On the well-posed property of boundary value problems for multidimensional equations of mixed type %J Doklady Akademii Nauk %D 1981 %P 834-836 %V 257 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_257_4_a14/ %G ru %F DAN_1981_257_4_a14