@article{10_4153_CMB_1994_070_7,
     author = {Heil, Wolfgang and Whitten, Wilbur},
     title = {The {Seifert} {Fiber} {Space} {Conjecture} and {Torus} {Theorem} for {Nonorientable} {3-Manifolds}},
     journal = {Canadian mathematical bulletin},
     pages = {482--489},
     year = {1994},
     volume = {37},
     number = {4},
     doi = {10.4153/CMB-1994-070-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1994-070-7/}
}