@article{CTGDC_1978__19_4_387_0,
     author = {Ehresmann, Andr\'ee and Ehresmann, Charles},
     title = {Multiple functors. {III.} {The} cartesian closed category $Cat_n$},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {387--443},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {19},
     number = {4},
     year = {1978},
     mrnumber = {515164},
     zbl = {0415.18006},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1978__19_4_387_0/}
}