@article{GDZPPN002337711,
title = {Rigidity of cusps in deformations of hyperbolic 3-orbifolds.},
journal = {Mathematische Annalen},
volume = {295},
year = {1993},
pages = {223-238},
zbl = {0813.57013},
url = {http://dml.mathdoc.fr/item/GDZPPN002337711}
}
Neumann, Walter D.; Reid, Alan W. Rigidity of cusps in deformations of hyperbolic 3-orbifolds.. Mathematische Annalen, Tome 295 (1993) pp. 223-238. http://gdmltest.u-ga.fr/item/GDZPPN002337711/