@article{BSMF_1975__103__241_0,
     author = {Evrard, Marcel},
     title = {Fibrations de petites cat\'egories},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {241--265},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {103},
     year = {1975},
     doi = {10.24033/bsmf.1804},
     mrnumber = {53 #5701},
     zbl = {0345.18008},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.1804/}
}