%0 Journal Article
%A V. N. Tulovskii
%T Asymptotic distribution of eigenvalues of differential operators with variable coefficients
%J Doklady Akademii Nauk
%D 1972
%P 827-830
%V 206
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_206_4_a13/
%G ru
%F DAN_1972_206_4_a13