@article{CMH_1940__13_138761,
     author = {B. de Ker\'ekj\'art\'o},
     title = {Sur le groupe des homographies et des antihomographies d'une variable complexe.},
     journal = {Commentarii mathematici Helvetici},
     pages = {68--82},
     publisher = {mathdoc},
     volume = {13},
     year = {1940},
     zbl = {0024.13101},
     url = {http://geodesic.mathdoc.fr/item/CMH_1940__13_138761/}
}