@article{GDZPPN002204916,
title = {Univalence criteria and surfaces in hyperbolic space.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {196-214},
zbl = {0645.30010},
url = {http://dml.mathdoc.fr/item/GDZPPN002204916}
}
Epstein, C.L. Univalence criteria and surfaces in hyperbolic space.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 196-214. http://gdmltest.u-ga.fr/item/GDZPPN002204916/