%0 Journal Article %A Yu. A. Blinkov %A M. D. Malykh %A L. A. Sevastianov %T On differential approximations of difference schemes %J Izvestiya of Saratov University. Mathematics. Mechanics. Informatics %D 2021 %P 472-488 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ISU_2021_21_4_a5/ %G ru %F ISU_2021_21_4_a5