@article{SD_1965-1966__19_1_A8_0,
     author = {L\'evy-Bruhl, Jacques},
     title = {Demi-groupes et cat\'egories \`a involution},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:9},
     pages = {1--48},
     publisher = {Secr\'etariat math\'ematique},
     volume = {19},
     number = {1},
     year = {1965-1966},
     zbl = {0261.18008},
     language = {fr},
     url = {http://www.numdam.org/item/SD_1965-1966__19_1_A8_0/}
}