@article{10_4153_CMB_2007_035_3,
     author = {Godinho, Leonor},
     title = {Equivariant {Cohomology} of {S} {1-Actions} on {4-Manifolds}},
     journal = {Canadian mathematical bulletin},
     pages = {365--376},
     year = {2007},
     volume = {50},
     number = {3},
     doi = {10.4153/CMB-2007-035-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2007-035-3/}
}