%0 Journal Article
%A M. M. Zainulabidov
%T Certain boundary value problems for equations of mixed type with two perpendicular lines of degeneracy
%J Differencialʹnye uravneniâ
%D 1969
%P 91-99
%V 5
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_1_a5/
%G ru
%F DE_1969_5_1_a5