@article{10_4153_CMB_2013_035_3,
     author = {Heil, Wolfgang and Wang, Dongxu},
     title = {On 3-manifolds with {Torus} or {Klein} {Bottle} {Category} {Two}},
     journal = {Canadian mathematical bulletin},
     pages = {526--537},
     year = {2014},
     volume = {57},
     number = {3},
     doi = {10.4153/CMB-2013-035-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2013-035-3/}
}