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@article{IVM_1969_8_a9, author = {I. Yu. Ryzhakov}, title = {The trigonometrical analogue of a~problem of {E.\,I.~Zolotarev}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {75--88}, publisher = {mathdoc}, number = {8}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_8_a9/} }
I. Yu. Ryzhakov. The trigonometrical analogue of a~problem of E.\,I.~Zolotarev. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1969), pp. 75-88. http://geodesic.mathdoc.fr/item/IVM_1969_8_a9/