@article{GDZPPN001257323,
title = {The translational degree of a semigroup.},
journal = {Semigroup forum},
volume = {30},
year = {1984},
pages = {331-350},
zbl = {0536.20039},
url = {http://dml.mathdoc.fr/item/GDZPPN001257323}
}
Hildebrant, J.A. The translational degree of a semigroup.. Semigroup forum, Tome 30 (1984) pp. 331-350. http://gdmltest.u-ga.fr/item/GDZPPN001257323/