@article{BSMF_1920__48__132_1,
     author = {Cartan, E.},
     title = {Sur les vari\'et\'es de courbure constante d'un espace euclidien ou non-euclidien},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {132--208},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {48},
     year = {1920},
     doi = {10.24033/bsmf.1007},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1007/}
}