@phdthesis{THESE_1920__22__1_0,
     author = {Deltheil, R.},
     title = {Sur la th\'eorie des probabilit\'es g\'eom\'etriques},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {22},
     year = {1920},
     language = {fr},
     url = {http://archive.numdam.org/item/THESE_1920__22__1_0/}
}