@article{10_2140_agt_2010_10_1627,
     author = {Ratcliffe, John G and Tschantz, Steven T},
     title = {Fibered orbifolds and crystallographic groups},
     journal = {Algebraic and Geometric Topology},
     pages = {1627--1664},
     year = {2010},
     volume = {10},
     number = {3},
     doi = {10.2140/agt.2010.10.1627},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2010.10.1627/}
}