%0 Journal Article %A Yu. M. Krikunov %T The Tricomi problem for the elliptic-hyperbolic Euler--Poisson--Darboux equation %J Doklady Akademii Nauk %D 1966 %P 1275-1278 %V 171 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1966_171_6_a8/ %G ru %F DAN_1966_171_6_a8