%0 Journal Article
%A M. M. Zainulabidov
%T The Tricomi problem when the line of change of type of the equation is closed
%J Differencialʹnye uravneniâ
%D 1988
%P 177-178
%V 24
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1988_24_1_a20/
%G ru
%F DE_1988_24_1_a20