%0 Journal Article
%A A. Dzhuraev
%T Degenerate elliptic and first-order mixed-type systems in a plane
%J Doklady Akademii Nauk
%D 1988
%P 1047-1051
%V 298
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1988_298_5_a3/
%G ru
%F DAN_1988_298_5_a3