@article{GDZPPN001252569,
title = {The semigroup of a strongly connected automaton.},
journal = {Semigroup forum},
volume = {14},
year = {1977},
pages = {351-356},
zbl = {0383.20056},
url = {http://dml.mathdoc.fr/item/GDZPPN001252569}
}
Oehmke, R.H. The semigroup of a strongly connected automaton.. Semigroup forum, Tome 14 (1977) pp. 351-356. http://gdmltest.u-ga.fr/item/GDZPPN001252569/