All flat manifolds are cusps of hyperbolic orbifolds.
Long, D.D. ; Reid, A.W.
Geometry & Topology, Tome 6 (2002), p. 285-296 / Harvested from The Electronic Library of Mathematics
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Publié le : 2002-01-01
DOI : https://doi.org/10.2140/agt.2002.2.285
EUDML-ID : urn:eudml:doc:122178 
@article{01732178,
     title = {All flat manifolds are cusps of hyperbolic orbifolds.},
     journal = {Geometry \& Topology},
     volume = {6},
     year = {2002},
     pages = {285-296},
     doi = {10.2140/agt.2002.2.285},
     zbl = {0998.57038},
     language = {en},
     url = {http://dml.mathdoc.fr/item/01732178}
}

Long, D.D.; Reid, A.W. All flat manifolds are cusps of hyperbolic orbifolds.. Geometry & Topology, Tome 6 (2002) pp. 285-296. doi : 10.2140/agt.2002.2.285. http://gdmltest.u-ga.fr/item/01732178/