%0 Journal Article
%A V. L. Ginzburg
%T On~closed characteristics of 2-forms
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1988
%P 225-226
%V 43
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1988_43_5_a15/
%G en
%F RM_1988_43_5_a15