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@article{MZM_1984_36_4_a8, author = {O. Ya. Viro}, title = {Signature of a branched covering}, journal = {Matemati\v{c}eskie zametki}, pages = {549--557}, publisher = {mathdoc}, volume = {36}, number = {4}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_4_a8/} }
O. Ya. Viro. Signature of a branched covering. Matematičeskie zametki, Tome 36 (1984) no. 4, pp. 549-557. http://geodesic.mathdoc.fr/item/MZM_1984_36_4_a8/