@article{CTGDC_2005__46_4_301_0,
     author = {Banaschewski, B.},
     title = {Projective frames : a general view},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {301--312},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {46},
     number = {4},
     year = {2005},
     mrnumber = {2248097},
     zbl = {1104.06006},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2005__46_4_301_0/}
}