@article{10_4153_CMB_1966_002_2,
     author = {Armstrong, William W.},
     title = {Curves on {Surfaces} of {Constant} {Width}},
     journal = {Canadian mathematical bulletin},
     pages = {15--22},
     year = {1966},
     volume = {9},
     number = {1},
     doi = {10.4153/CMB-1966-002-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-002-2/}
}