@phdthesis{THESE_1939__222__1_0,
     author = {Rosca, Radu},
     title = {Transformations asymptotiques des courbes de l'espace elliptique. {Courbes} de {Bertrand}},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {222},
     year = {1939},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1939__222__1_0/}
}