@article{10_4153_CMB_1970_016_1,
     author = {Douglas, Robert J.},
     title = {A {Note} on a {Theorem} of {H.} {L.} {Abbott}},
     journal = {Canadian mathematical bulletin},
     pages = {79--81},
     year = {1970},
     volume = {13},
     number = {1},
     doi = {10.4153/CMB-1970-016-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-016-1/}
}