@phdthesis{THESE_1933__151__1_0,
     author = {Li, Hen},
     title = {Recherches statistiques sur les c\'eph\'eides},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {151},
     year = {1933},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1933__151__1_0/}
}