@article{SD_1970-1971__24_1_A5_0,
     author = {Bouvier, Alain},
     title = {Demi-groupes pr\'esimplifiables},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:6},
     pages = {1--17},
     publisher = {Secr\'etariat math\'ematique},
     volume = {24},
     number = {1},
     year = {1970-1971},
     mrnumber = {414749},
     zbl = {0246.20058},
     language = {fr},
     url = {http://www.numdam.org/item/SD_1970-1971__24_1_A5_0/}
}