@phdthesis{THESE_1938__200__1_0,
     author = {Roger, Fr\'ed\'eric},
     title = {Les propri\'et\'es tangentielles des ensembles euclidiens de points},
     series = {Th\`eses de l'entre-deux-guerres},
     number = {200},
     year = {1938},
     language = {fr},
     url = {http://www.numdam.org/item/THESE_1938__200__1_0/}
}