@article{GDZPPN001250647,
title = {Bounded derivations on commutative semigroups.},
journal = {Semigroup forum},
volume = {11},
year = {1975},
pages = {229-237},
zbl = {0298.43003},
url = {http://dml.mathdoc.fr/item/GDZPPN001250647}
}
Dunkl, C.F. Bounded derivations on commutative semigroups.. Semigroup forum, Tome 11 (1975) pp. 229-237. http://gdmltest.u-ga.fr/item/GDZPPN001250647/