@article{CTGDC_1981__22_1_19_0,
     author = {Coste, Michel and Coste-Roy, Marie-Fran\c{c}oise},
     title = {Le topos \'etale r\'eel d'un anneau},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {19--24},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {22},
     number = {1},
     year = {1981},
     mrnumber = {609155},
     zbl = {0454.18008},
     language = {fr},
     url = {http://www.numdam.org/item/CTGDC_1981__22_1_19_0/}
}