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@article{IVM_1977_2_a3, author = {L. Ya. Vulakh}, title = {Hurwitz constants}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {21--23}, publisher = {mathdoc}, number = {2}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_2_a3/} }
L. Ya. Vulakh. Hurwitz constants. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1977), pp. 21-23. http://geodesic.mathdoc.fr/item/IVM_1977_2_a3/