@article{SD_1969-1970__23_2_A6_0,
     author = {Ault, Janet and Petrich, Mario},
     title = {The structure of $\omega $-regular semigroups},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:DG 6},
     pages = {DG1--DG5},
     publisher = {Secr\'etariat math\'ematique},
     volume = {23},
     number = {2},
     year = {1969-1970},
     zbl = {0226.20065},
     language = {en},
     url = {http://archive.numdam.org/item/SD_1969-1970__23_2_A6_0/}
}