@article{10_2140_agt_2002_2_285,
     author = {Long, Darren D and Reid, Alan W},
     title = {All flat manifolds are cusps of hyperbolic orbifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {285--296},
     year = {2002},
     volume = {2},
     number = {1},
     doi = {10.2140/agt.2002.2.285},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2002.2.285/}
}