@article{BSMF_1879__7__124_0,
     author = {Borchardt, C. W.},
     title = {Sur un syst\`eme de trois \'equations diff\'erentielles totales qui d\'efinissent la moyenne arithm\'etico-g\'eom\'etrique de quatre \'el\'ements},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {124--128},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {7},
     year = {1879},
     doi = {10.24033/bsmf.166},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.166/}
}