@article{IM2_1976_10_5_a0,
     author = {S. G. Vl\u{a}du\c{t}},
     title = {On the coefficient ring in a~semigroup ring},
     journal = {Izvestiya. Mathematics},
     pages = {899--911},
     year = {1976},
     volume = {10},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1976_10_5_a0/}
}