@article{100671, author = {Karl Heinrich Hofmann and Paul S. Mostert}, title = {Connected extensions of simple semigroups}, journal = {Czechoslovak Mathematical Journal}, volume = {15}, year = {1965}, pages = {295-298}, zbl = {0135.06601}, mrnumber = {0175100}, language = {en}, url = {http://dml.mathdoc.fr/item/100671} }
Hofmann, Karl Heinrich; Mostert, Paul S. Connected extensions of simple semigroups. Czechoslovak Mathematical Journal, Tome 15 (1965) pp. 295-298. http://gdmltest.u-ga.fr/item/100671/
Extensions of semigroups, Trans. Amer. Math. Soc., 68 (1950), 165-173. (1950) | Article | MR 0033836 | Zbl 0037.01001
The Rees-Suschewitsch structure theorem for compact simple semigroups, Proc. Amer. Math. Soc., 42 (1956), 430-432. (1956) | MR 0079009