%0 Journal Article
%A V. A. Novikov
%T Existence and nonexistence theorems for a class of equations of variable type
%J Doklady Akademii Nauk
%D 1980
%P 1311-1313
%V 253
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_253_6_a5/
%G ru
%F DAN_1980_253_6_a5