%0 Journal Article
%A N. Kh. Ibragimov
%A A. B. Shabat
%T Evolutionary equations with nontrivial Lie--B\"acklund group
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1980
%P 25-36
%V 14
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1980_14_1_a3/
%G ru
%F FAA_1980_14_1_a3