%0 Journal Article
%A R. P. Malayshka
%T Symmetries of the Birkhoff equations, and conservation laws
%J Differencialʹnye uravneniâ
%D 1989
%P 1275-1277
%V 25
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1989_25_7_a27/
%G ru
%F DE_1989_25_7_a27