@article{GDZPPN001257005, title = {Globals of completely regular periodic semigroups.}, journal = {Semigroup forum}, volume = {30}, year = {1984}, pages = {365-374}, zbl = {0553.20036}, url = {http://dml.mathdoc.fr/item/GDZPPN001257005} }
Gould, M.; Iskra, J.; Tsinakis, C. Globals of completely regular periodic semigroups.. Semigroup forum, Tome 30 (1984) pp. 365-374. http://gdmltest.u-ga.fr/item/GDZPPN001257005/