@phdthesis{THESE_1918__14__1_0,
     author = {Humbert, Pierre},
     title = {Sur les surfaces de {Poincar\'e}},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {14},
     year = {1918},
     language = {fr},
     url = {http://archive.numdam.org/item/THESE_1918__14__1_0/}
}