@article{GDZPPN00124888X, title = {Errors in elements of compact semigroups.}, journal = {Semigroup forum}, volume = {4}, year = {1972}, pages = {285-322}, zbl = {0265.22004}, url = {http://dml.mathdoc.fr/item/GDZPPN00124888X} }
Hofmann, K.H.; Mislove, M.; Carruth, J.H. Errors in elements of compact semigroups.. Semigroup forum, Tome 4 (1972) pp. 285-322. http://gdmltest.u-ga.fr/item/GDZPPN00124888X/