%0 Journal Article
%A A. M. Nakhushev
%T On apriori estimates for the Tricomi and Darboux problems
%J Differencialʹnye uravneniâ
%D 1972
%P 107-117
%V 8
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_1_a11/
%G ru
%F DE_1972_8_1_a11