%0 Journal Article
%A A. V. Knyazev
%T Differential operators with nonrational characteristics
%J Differencialʹnye uravneniâ
%D 1982
%P 1986-1989
%V 18
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_11_a21/
%G ru
%F DE_1982_18_11_a21