%0 Journal Article
%A V. M. Filippov
%T A general approach to symmetrization of differential operators
%J Differencialʹnye uravneniâ
%D 1985
%P 539-541
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1985_21_3_a28/
%G ru
%F DE_1985_21_3_a28