@article{BSMF_1899__27__171_0,
     author = {Fonten\'e, G.},
     title = {Sur un syst\`eme de sept clefs},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {171--180},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {27},
     year = {1899},
     doi = {10.24033/bsmf.604},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.604/}
}