@article{GDZPPN002065290,
title = {Quasiregular mappings and metrics on the n-sphere with punctures.},
journal = {Commentarii mathematici Helvetici},
volume = {59},
year = {1984},
pages = {136-148},
zbl = {0556.30016},
url = {http://dml.mathdoc.fr/item/GDZPPN002065290}
}
Rickman, Seppo. Quasiregular mappings and metrics on the n-sphere with punctures.. Commentarii mathematici Helvetici, Tome 59 (1984) pp. 136-148. http://gdmltest.u-ga.fr/item/GDZPPN002065290/