%0 Journal Article
%A N. I. Popivanov
%T Boundary value problems for degenerate multidimensional hyperbolic equations
%J Differencialʹnye uravneniâ
%D 1975
%P 116-126
%V 11
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1975_11_1_a13/
%G ru
%F DE_1975_11_1_a13