%0 Journal Article
%A N. A. Sidorov
%A O. A. Romanova
%A E. B. Blagodatskaya
%T Partial differential equations with an operator of finite index at the principal part
%J Differencialʹnye uravneniâ
%D 1994
%P 729-731
%V 30
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1994_30_4_a20/
%G ru
%F DE_1994_30_4_a20