%0 Journal Article %A Wolfgang Huck %T Circle actions on 4-manifolds I. %J Manuscripta mathematica %D 1995 %P 51-70 %V 87 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1995__87_4_156074/ %F MM2_1995__87_4_156074