@article{GDZPPN001247743,
title = {The centralizing theorem for left normal groups of units in compact monoids.},
journal = {Semigroup forum},
volume = {2},
year = {1971},
pages = {31-42},
zbl = {0223.22002},
url = {http://dml.mathdoc.fr/item/GDZPPN001247743}
}
Hofmann, K.H.; Mislove, M. The centralizing theorem for left normal groups of units in compact monoids.. Semigroup forum, Tome 2 (1971) pp. 31-42. http://gdmltest.u-ga.fr/item/GDZPPN001247743/