%0 Journal Article %A Wolfgang Kühnel %T Tight embeddings of simply connected $4$-manifolds %J Documenta mathematica %D 2004 %P 401-412 %V 9 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/171/ %R 10.4171/dm/171 %F 10_4171_dm_171