@article{PDML_1970__7_1_86_0,
     author = {Brissaud, Marcel},
     title = {Sur une extension d'un th\'eor\`eme de {Tortrat}},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {86--103},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {7},
     number = {1},
     year = {1970},
     mrnumber = {296985},
     zbl = {0216.46104},
     language = {fr},
     url = {http://www.numdam.org/item/PDML_1970__7_1_86_0/}
}