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@article{MAN_1975__215_162716, author = {U. Hirsch and W.D. Neumann}, title = {On {Cyclic} {Branched} {Coverings} of {Spheres.}}, journal = {Mathematische Annalen}, pages = {289--291}, publisher = {mathdoc}, volume = {215}, year = {1975}, zbl = {0289.57003}, url = {http://geodesic.mathdoc.fr/item/MAN_1975__215_162716/} }
U. Hirsch; W.D. Neumann. On Cyclic Branched Coverings of Spheres.. Mathematische Annalen, Tome 215 (1975), pp. 289-291. http://geodesic.mathdoc.fr/item/MAN_1975__215_162716/