@article{SD_1969-1970__23_2_A12_0,
     author = {Peinado, Rolando E.},
     title = {Finite semigroups admitting ring structure},
     journal = {S\'eminaire Albert Ch\^atelet et Paul Dubreil},
     note = {talk:DG 13},
     pages = {DG1--DG3},
     year = {1969-1970},
     publisher = {Secr\'etariat math\'ematique},
     volume = {23},
     number = {2},
     zbl = {0228.20037},
     language = {en},
     url = {https://www.numdam.org/item/SD_1969-1970__23_2_A12_0/}
}