%0 Journal Article
%A A. I. Kozhanov
%A G. A. Lukina
%T Degeneration in differential equations with multiple characteristics
%J Matematičeskie zametki SVFU
%D 2021
%P 19-30
%V 28
%N 3
%U http://geodesic.mathdoc.fr/item/SVFU_2021_28_3_a1/
%G ru
%F SVFU_2021_28_3_a1