%0 Journal Article
%A V. I. Feigin
%T Spectral asymptotic theory for boundary value problems, and the asymptotic behavior of the negative spectrum
%J Doklady Akademii Nauk
%D 1977
%P 1269-1272
%V 232
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_232_6_a9/
%G ru
%F DAN_1977_232_6_a9