%0 Journal Article %A Selman Akbulut %T On Representing Homology Classes of 4-Manifolds. %J Inventiones mathematicae %D 1978 %P 193-198 %V 49 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1978__49_142601/ %F IM_1978__49_142601