%0 Journal Article
%A B. Yu. Sternin
%T On differential equations of subprincipal type
%J Doklady Akademii Nauk
%D 1982
%P 1078-1081
%V 265
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1982_265_5_a12/
%G ru
%F DAN_1982_265_5_a12