TY - JOUR AU - F.A. Bogomolov TI - On the Cohomology Ring of a Simple Hyperkähler Manifold (On the Results of Verbitsky). JO - Geometric and functional analysis PY - 1996 SP - 612 EP - 618 VL - 6 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/GFA_1996__6_1_58240/ ID - GFA_1996__6_1_58240 ER -