@article{GDZPPN001261274,
title = {Another semigroup of complexity n-1.},
journal = {Semigroup forum},
volume = {43},
year = {1991},
pages = {257-259},
zbl = {0737.20028},
url = {http://dml.mathdoc.fr/item/GDZPPN001261274}
}
Foster, A. Another semigroup of complexity n-1.. Semigroup forum, Tome 43 (1991) pp. 257-259. http://gdmltest.u-ga.fr/item/GDZPPN001261274/