@article{GDZPPN001247964,
title = {Decomposition and complexity of finite semigroups.},
journal = {Semigroup forum},
volume = {2},
year = {1971},
pages = {189-250},
zbl = {0226.20060},
url = {http://dml.mathdoc.fr/item/GDZPPN001247964}
}
Tilson, B. Decomposition and complexity of finite semigroups.. Semigroup forum, Tome 2 (1971) pp. 189-250. http://gdmltest.u-ga.fr/item/GDZPPN001247964/