@article{GDZPPN00125720X,
title = {Characters and the structure of finite semigroups.},
journal = {Semigroup forum},
volume = {30},
year = {1984},
pages = {211-220},
zbl = {0533.20040},
url = {http://dml.mathdoc.fr/item/GDZPPN00125720X}
}
Grassmann, H. Characters and the structure of finite semigroups.. Semigroup forum, Tome 30 (1984) pp. 211-220. http://gdmltest.u-ga.fr/item/GDZPPN00125720X/