@article{PDML_1970__7_2_A3_0,
     author = {Bouvier, Alain and Faisant, Alain},
     title = {Propri\'et\'es des demi-groupes de fractions},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {115--136},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {7},
     number = {2},
     year = {1970},
     mrnumber = {294533},
     zbl = {0253.20086},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1970__7_2_A3_0/}
}