@article{100142, author = {Zbyn\v ek N\'aden\'\i k}, title = {Poverkhnosti, analogichnye krivym Bertrana}, journal = {Czechoslovak Mathematical Journal}, volume = {05}, year = {1955}, pages = {194-219}, zbl = {0085.36502}, mrnumber = {0074849}, language = {ru}, url = {http://dml.mathdoc.fr/item/100142} }
Nádeník, Zbyněk. Поверхности, аналогичные кривым Бертрана. Czechoslovak Mathematical Journal, Tome 05 (1955) pp. 194-219. http://gdmltest.u-ga.fr/item/100142/
Les systèmes différentiels extérieurs et leurs applications géométriques, Paris 1945. (1945) | MR 0016174 | Zbl 0063.00734
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