%0 Journal Article
%A S. Z. Levendorskii
%T On generalizations of the Weyl formula for degenerate operators
%J Doklady Akademii Nauk
%D 1987
%P 1297-1301
%V 293
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a2/
%G ru
%F DAN_1987_293_6_a2