@article{JMPA_1939_9_18__167_0,
     author = {Rosca, Radu},
     title = {Transformations asymptotiques des courbes de l'espace elliptique. {Courbes} de {Bertrand}},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {167--215},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 18},
     year = {1939},
     mrnumber = {507},
     zbl = {0022.07803},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1939_9_18__167_0/}
}