@article{CTGDC_1968__10_4_475_0,
     author = {Sadr, Mohammad T.},
     title = {Structures topog\`enes sur une cat\'egorie},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {475--505},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {10},
     number = {4},
     year = {1968},
     mrnumber = {266025},
     zbl = {0184.25801},
     language = {fr},
     url = {http://www.numdam.org/item/CTGDC_1968__10_4_475_0/}
}