@article{CTGDC_1980__21_4_353_0,
     author = {Mac Lane, Saunders},
     title = {The genesis of mathematical structures, as exemplified in the work of {Charles} {Ehresmann}},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {353--365},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {21},
     number = {4},
     year = {1980},
     mrnumber = {606381},
     zbl = {0441.18001},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1980__21_4_353_0/}
}