@article{100035, author = {Zbyn\v ek N\'aden\'\i k}, title = {Krivye Bertrana v piatimernom prostranstve}, journal = {Czechoslovak Mathematical Journal}, volume = {02}, year = {1952}, pages = {57-87}, zbl = {0048.38702}, mrnumber = {0053564}, language = {ru}, url = {http://dml.mathdoc.fr/item/100035} }
Nádeník, Zbyněk. Кривые Бертрана в пятимерном пространстве. Czechoslovak Mathematical Journal, Tome 02 (1952) pp. 57-87. http://gdmltest.u-ga.fr/item/100035/