@article{SD_1969-1970__23_2_A11_0,
     author = {Kolibiarov\'a, Blanka},
     title = {On the construction of some semigroups},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:DG 12},
     pages = {DG1--DG2},
     publisher = {Secr\'etariat math\'ematique},
     volume = {23},
     number = {2},
     year = {1969-1970},
     mrnumber = {277631},
     zbl = {0215.40102},
     language = {en},
     url = {http://www.numdam.org/item/SD_1969-1970__23_2_A11_0/}
}