%0 Journal Article
%A M. M. Vinogradov
%T Extensions of fields and extensions of linear differential operators
%J Matematičeskie zametki
%D 1981
%P 237-248
%V 30
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1981_30_2_a9/
%G ru
%F MZM_1981_30_2_a9