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@article{MAN_1993__295_1_165040, author = {Walter D. Neumann and Alan W. Reid}, title = {Rigidity of cusps in deformations of hyperbolic 3-orbifolds.}, journal = {Mathematische Annalen}, pages = {223--238}, publisher = {mathdoc}, volume = {295}, number = {1}, year = {1993}, zbl = {0813.57013}, url = {http://geodesic.mathdoc.fr/item/MAN_1993__295_1_165040/} }
Walter D. Neumann; Alan W. Reid. Rigidity of cusps in deformations of hyperbolic 3-orbifolds.. Mathematische Annalen, Tome 295 (1993) no. 1, pp. 223-238. http://geodesic.mathdoc.fr/item/MAN_1993__295_1_165040/