%0 Journal Article
%A A. M. Vinogradov
%T The theory of higher infinitesimal symmetries of nonlinear partial differential equations
%J Doklady Akademii Nauk
%D 1979
%P 274-278
%V 248
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_248_2_a3/
%G ru
%F DAN_1979_248_2_a3