@article{SD_1971-1972__25_1_A11_0,
     author = {Gerente, Alain},
     title = {Demi-groupes duaux},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:12},
     pages = {1--21},
     publisher = {Secr\'etariat math\'ematique},
     volume = {25},
     number = {1},
     year = {1971-1972},
     mrnumber = {404489},
     zbl = {0354.20046},
     language = {fr},
     url = {http://www.numdam.org/item/SD_1971-1972__25_1_A11_0/}
}