%0 Journal Article
%A V. E. Zakharov
%A A. V. Mikhailov
%T Variational principle for equations integrable by the inverse problem method
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1980
%P 55-56
%V 14
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1980_14_1_a10/
%G ru
%F FAA_1980_14_1_a10