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@article{IVM_1985_1_a9, author = {I. V. Chvostova}, title = {A~characteristic of the sine function}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {51--53}, publisher = {mathdoc}, number = {1}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1985_1_a9/} }
I. V. Chvostova. A~characteristic of the sine function. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1985), pp. 51-53. http://geodesic.mathdoc.fr/item/IVM_1985_1_a9/