@phdthesis{THESE_1939__223__1_0,
     author = {Roure, Henri},
     title = {Recherches sur le calcul des perturbations g\'en\'erales des petites plan\`etes},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {223},
     year = {1939},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1939__223__1_0/}
}