@phdthesis{THESE_1940__235__1_0,
     author = {Potier, Robert},
     title = {Sur certaines questions de g\'eom\'etrie diff\'erentielle conforme},
     series = {Th\`eses de l'entre-deux-guerres},
     year = {1940},
     number = {235},
     language = {fr},
     url = {https://www.numdam.org/item/THESE_1940__235__1_0/}
}