1. Bioche, Ch: Sur les courbes de M. Bertrand, Bulletin de la Société Mathématique de France 17, 109–112 (1889). https://doi.org/10.24033/bsmf.387
2. Eisenhart, L.P.: An Introduction to Differential Geometry. Princeton University Press, Princeton (1947)
3. Gomes Teixeira, F.: Traité des courbes spéciales remarquables planes et gauches, t.2, page 447, Imprimerie de l’Université, Coimbra, Portugal (1909)
4. Izumiya, S., Takeuchi, N.: Generic properties of helices and Bertrand curves. J. Geom. 74, 97–109 (2002). https://doi.org/10.1007/PL00012543
5. Izumiya, S., Takeuchi, N.: New special curves and developable surfaces turk. J. Math. 28(2), 153–163 (2004)