%0 Journal Article
%A V. Ya. Ivrii
%T On precise asymptotics of the eigenvalues for two classes of differential operators in $\mathbf{R}^d$
%J Doklady Akademii Nauk
%D 1984
%P 268-270
%V 276
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_276_2_a1/
%G ru
%F DAN_1984_276_2_a1