%0 Journal Article %A V. G. Kopp %T Ruled surfaces obtained in connection with the study of certain curve families %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1962 %P 67-74 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1962_3_a7/ %G ru %F IVM_1962_3_a7