%0 Journal Article
%A N. Yu. Kapustin
%T On the theory of equations of mixed type
%J Differencialʹnye uravneniâ
%D 1982
%P 1078-1080
%V 18
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_6_a20/
%G ru
%F DE_1982_18_6_a20