@article{10_4064_fm_103_1_43_45,
     author = {Eric Robinson},
     title = {A characterization of certain branched coverings as group actions},
     journal = {Fundamenta Mathematicae},
     pages = {43--45},
     publisher = {mathdoc},
     volume = {103},
     number = {1},
     year = {1979},
     doi = {10.4064/fm-103-1-43-45},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-103-1-43-45/}
}