%0 Journal Article
%A B. S. Kruglikov
%T The image in $H^2(Q^3;\mathbb R)$ of the~set of presymplectic forms with a~prescribed kernel
%J Sbornik. Mathematics
%D 1997
%P 75-85
%V 188
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1997_188_1_a3/
%G en
%F SM_1997_188_1_a3