@phdthesis{THESE_1930__110__1_0,
     author = {Herbrand, Jacques},
     title = {Recherches sur la th\'eorie de la d\'emonstration},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {110},
     year = {1930},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1930__110__1_0/}
}