TY  - JOUR
AU  - B. S. Kruglikov
TI  - The image in $H^2(Q^3;\mathbb R)$ of the~set of presymplectic forms with a~prescribed kernel
JO  - Sbornik. Mathematics
PY  - 1997
SP  - 75
EP  - 85
VL  - 188
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1997_188_1_a3/
LA  - en
ID  - SM_1997_188_1_a3
ER  -