%0 Journal Article
%A V. A. Krasnov
%T On~cohomology classes defined by the real points of a real algebraic $\operatorname{GM}$-surface
%J Izvestiya. Mathematics 
%D 1994
%P 385-395
%V 43
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1994_43_2_a10/
%G en
%F IM2_1994_43_2_a10