@article{MM2_1995__87_4_156074,
     author = {Wolfgang Huck},
     title = {Circle actions on 4-manifolds {I.}},
     journal = {Manuscripta mathematica},
     pages = {51--70},
     publisher = {mathdoc},
     volume = {87},
     number = {4},
     year = {1995},
     zbl = {0839.57024},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__87_4_156074/}
}