%0 Journal Article %A Fernández, Marisa %A de León, Manuel %T Compact symplectic four-dimensional manifolds not admitting polarizations %J Commentationes Mathematicae Universitatis Carolinae %D 1989 %P 789-793 %V 30 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1989__30_4_a22/ %G en %F CMUC_1989__30_4_a22