@article{AFM_2000_25_1_a7,
     author = {Petra Bonfert-Taylor},
     title = {J{\o}rgensen's inequality for discrete convergence groups},
     journal = {Annales Fennici Mathematici},
     pages = {131--150},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2000_25_1_a7/}
}