@article{PDML_1969__6_1_73_0,
     author = {Faisant, Alain},
     title = {Sur les demi-groupes de fractions},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {73--85},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {6},
     number = {1},
     year = {1969},
     mrnumber = {245707},
     zbl = {0205.02001},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1969__6_1_73_0/}
}