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@article{IVM_1962_3_a7, author = {V. G. Kopp}, title = {Ruled surfaces obtained in connection with the study of certain curve families}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {67--74}, publisher = {mathdoc}, number = {3}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1962_3_a7/} }
V. G. Kopp. Ruled surfaces obtained in connection with the study of certain curve families. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1962), pp. 67-74. http://geodesic.mathdoc.fr/item/IVM_1962_3_a7/