%0 Journal Article
%A K. B. Sabitov
%T The maximum principle for equations of mixed type
%J Differencialʹnye uravneniâ
%D 1988
%P 1967-1976
%V 24
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1988_24_11_a13/
%G ru
%F DE_1988_24_11_a13