%0 Journal Article
%A Ya. A. Roitberg
%A Z. G. Sheftel
%T On general elliptic problems with strong degeneration
%J Doklady Akademii Nauk
%D 1980
%P 1336-1342
%V 254
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_254_6_a13/
%G ru
%F DAN_1980_254_6_a13