@article{CTGDC_1992__33_4_291_0,
     author = {Heggie, Murray},
     title = {Homotopy cofibrations in $CAT$},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {291--313},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {33},
     number = {4},
     year = {1992},
     mrnumber = {1197427},
     zbl = {0774.18009},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1992__33_4_291_0/}
}