@article{10_4153_CMB_1978_006_3,
     author = {Hoffman, P. and Zabrodsky, A.},
     title = {Thin {Lens} {Spaces}},
     journal = {Canadian mathematical bulletin},
     pages = {31--35},
     year = {1978},
     volume = {21},
     number = {1},
     doi = {10.4153/CMB-1978-006-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-006-3/}
}