@article{GDZPPN001251740,
title = {Globally Abelian transformation semigroups.},
journal = {Semigroup forum},
volume = {12},
year = {1976},
pages = {221-228},
zbl = {0353.20054},
url = {http://dml.mathdoc.fr/item/GDZPPN001251740}
}
Rankin, S.A.; Reis, C.M.; Wang, M.L. Globally Abelian transformation semigroups.. Semigroup forum, Tome 12 (1976) pp. 221-228. http://gdmltest.u-ga.fr/item/GDZPPN001251740/