%0 Journal Article %A S. P. Pul'kin %T The Tricomi problem for the general equation of Lavrentiev--Bitzadze %J Doklady Akademii Nauk %D 1958 %P 38-41 %V 118 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_118_1_a9/ %G ru %F DAN_1958_118_1_a9