@phdthesis{THESE_1933__150__1_0,
     author = {Bourion, Georges},
     title = {Recherches sur l'ultraconvergence},
     series = {Th\`eses de l'entre-deux-guerres},
     year = {1933},
     number = {150},
     language = {fr},
     url = {https://www.numdam.org/item/THESE_1933__150__1_0/}
}