%0 Journal Article
%A N. A. Zhikhar
%T Certain properties of differential operators with variable coefficients that depend on the form of the domain
%J Differencialʹnye uravneniâ
%D 1972
%P 645-651
%V 8
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_4_a8/
%G ru
%F DE_1972_8_4_a8