@article{MZ_1978__160_172682,
     author = {Ky Fan},
     title = {Analytic functions of a {Proper} {Contraction.}},
     journal = {Mathematische Zeitschrift},
     pages = {275--290},
     publisher = {mathdoc},
     volume = {160},
     year = {1978},
     zbl = {0441.30060},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__160_172682/}
}