@article{10_1017_S001708950000865X,
     author = {Kelarev, A. V.},
     title = {The regular radical of semigroup rings of commutative semigroups},
     journal = {Glasgow mathematical journal},
     pages = {133--141},
     year = {1992},
     volume = {34},
     number = {2},
     doi = {10.1017/S001708950000865X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000865X/}
}