@article{10_4153_CMB_2004_032_5,
     author = {Charette, Virginie and Goldman, William M. and Jones, Catherine A.},
     title = {Recurrent {Geodesics} in {Flat} {Lorentz} {3-Manifolds}},
     journal = {Canadian mathematical bulletin},
     pages = {332--342},
     year = {2004},
     volume = {47},
     number = {3},
     doi = {10.4153/CMB-2004-032-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2004-032-5/}
}