TY - JOUR AU - V. A. Popov TI - Closed 2-forms and embedding theorems for arbitrary symplectic manifolds JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1988 SP - 43 EP - 47 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1988_4_a6/ LA - ru ID - IVM_1988_4_a6 ER -