@article{1183530108,
author = {Rhodes, John},
title = {The fundamental lemma of complexity for arbitrary finite semigroups},
journal = {Bull. Amer. Math. Soc.},
volume = {74},
number = {6},
year = {1968},
pages = { 1104-1109},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530108}
}
Rhodes, John. The fundamental lemma of complexity for arbitrary finite semigroups. Bull. Amer. Math. Soc., Tome 74 (1968) no. 6, pp. 1104-1109. http://gdmltest.u-ga.fr/item/1183530108/