%0 Journal Article
%A L. I. Kovalenko
%T Existence of a generalized solution of the Tricomi problem.~I
%J Differencialʹnye uravneniâ
%D 1976
%P 511-528
%V 12
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_3_a11/
%G ru
%F DE_1976_12_3_a11