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@article{DAN_1986_290_4_a4, author = {A. N. Protopopov}, title = {Homeomorphisms of branched coverings of a two-dimensional sphere}, journal = {Doklady Akademii Nauk}, pages = {792--795}, publisher = {mathdoc}, volume = {290}, number = {4}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1986_290_4_a4/} }
A. N. Protopopov. Homeomorphisms of branched coverings of a two-dimensional sphere. Doklady Akademii Nauk, Tome 290 (1986) no. 4, pp. 792-795. http://geodesic.mathdoc.fr/item/DAN_1986_290_4_a4/