%0 Journal Article
%A A. Yu. Duplishcheva
%T About differential operators and matrices of the second order
%J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics
%D 2015
%P 31-37
%V 15
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ISU_2015_15_1_a4/
%G ru
%F ISU_2015_15_1_a4