@article{CMH_1986__61_140045,
     author = {Mika Sepp\"al\"a and Tuomas Sorvali},
     title = {Parametrization of {M\"obius} groups acting in a disk.},
     journal = {Commentarii mathematici Helvetici},
     pages = {149--160},
     publisher = {mathdoc},
     volume = {61},
     year = {1986},
     zbl = {0606.30042},
     url = {http://geodesic.mathdoc.fr/item/CMH_1986__61_140045/}
}