@article{GDZPPN002204053,
title = {The hyperbolic Gauss map and quasiconformal reflections.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {372},
year = {1986},
pages = {96-135},
zbl = {0591.30018},
url = {http://dml.mathdoc.fr/item/GDZPPN002204053}
}
Epstein, Charles L. The hyperbolic Gauss map and quasiconformal reflections.. Journal für die reine und angewandte Mathematik, Tome 372 (1986) pp. 96-135. http://gdmltest.u-ga.fr/item/GDZPPN002204053/