@article{SF_1984__28_134647,
     author = {I.S. Ponizovski{\^\i}},
     title = {On semigroup rings.},
     journal = {Semigroup forum},
     pages = {143--154},
     publisher = {mathdoc},
     volume = {28},
     year = {1984},
     zbl = {0527.20049},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__28_134647/}
}