%0 Journal Article %A M. M. Zainulabidov %T The two-dimensional Tricomi problem when the domain of parabolicity is two-dimensional %J Differencialʹnye uravneniâ %D 1985 %P 51-58 %V 21 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_1_a7/ %G ru %F DE_1985_21_1_a7