@article{GDZPPN001251848,
title = {General mutants in semigroups.},
journal = {Semigroup forum},
volume = {12},
year = {1976},
pages = {297-300},
zbl = {0354.20050},
url = {http://dml.mathdoc.fr/item/GDZPPN001251848}
}
Kim, K. H.; Roush, F. General mutants in semigroups.. Semigroup forum, Tome 12 (1976) pp. 297-300. http://gdmltest.u-ga.fr/item/GDZPPN001251848/