@article{10_4153_CMB_1977_018_4,
     author = {Hardie, K. A.},
     title = {A {Note} on the {Category} of the {Telescope}},
     journal = {Canadian mathematical bulletin},
     pages = {107--107},
     year = {1977},
     volume = {20},
     number = {1},
     doi = {10.4153/CMB-1977-018-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-018-4/}
}