@article{GDZPPN001251201, title = {Polynomial functions over commutative semigroups.}, journal = {Semigroup forum}, volume = {12}, year = {1976}, pages = {109-118}, zbl = {0338.20089}, url = {http://dml.mathdoc.fr/item/GDZPPN001251201} }
Kowol, G.; Mitsch, H. Polynomial functions over commutative semigroups.. Semigroup forum, Tome 12 (1976) pp. 109-118. http://gdmltest.u-ga.fr/item/GDZPPN001251201/