@article{AFM_1999_24_1_a17,
     author = {O. Martio and U. Srebro and J. V\"ais\"al\"a},
     title = {Normal families, multiplicity and the branch set of quasiregular maps},
     journal = {Annales Fennici Mathematici},
     pages = {231--252},
     year = {1999},
     volume = {24},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1999_24_1_a17/}
}