@article{GDZPPN002311208, title = {On Cyclic Branched Coverings of Spheres.}, journal = {Mathematische Annalen}, volume = {217}, year = {1975}, pages = {289-291}, zbl = {0289.57003}, url = {http://dml.mathdoc.fr/item/GDZPPN002311208} }
Hirsch, U.; Neumann, W.D. On Cyclic Branched Coverings of Spheres.. Mathematische Annalen, Tome 217 (1975) pp. 289-291. http://gdmltest.u-ga.fr/item/GDZPPN002311208/