@article{GDZPPN001263099, title = {Radicals of semigroup rings of commutative semigroups.}, journal = {Semigroup forum}, volume = {48}, year = {1994}, pages = {1-17}, zbl = {0793.16018}, url = {http://dml.mathdoc.fr/item/GDZPPN001263099} }
Kelarev, A.V. Radicals of semigroup rings of commutative semigroups.. Semigroup forum, Tome 48 (1994) pp. 1-17. http://gdmltest.u-ga.fr/item/GDZPPN001263099/