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@article{DAN_1973_208_3_a0, author = {V. B. Alekseev}, title = {On the number of $k$-valued monotonic functions}, journal = {Doklady Akademii Nauk}, pages = {505--508}, publisher = {mathdoc}, volume = {208}, number = {3}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_3_a0/} }
V. B. Alekseev. On the number of $k$-valued monotonic functions. Doklady Akademii Nauk, Tome 208 (1973) no. 3, pp. 505-508. http://geodesic.mathdoc.fr/item/DAN_1973_208_3_a0/