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@article{BUMI_1999_8_2B_1_a4, author = {Petrich, Mario and Silva, Pedro V.}, title = {On presentations of semigroup rings}, journal = {Bollettino della Unione matematica italiana}, pages = {127--142}, publisher = {mathdoc}, volume = {Ser. 8, 2B}, number = {1}, year = {1999}, zbl = {0924.16022}, mrnumber = {466355}, language = {en}, url = {http://geodesic.mathdoc.fr/item/BUMI_1999_8_2B_1_a4/} }
Petrich, Mario; Silva, Pedro V. On presentations of semigroup rings. Bollettino della Unione matematica italiana, Série 8, 2B (1999) no. 1, pp. 127-142. http://geodesic.mathdoc.fr/item/BUMI_1999_8_2B_1_a4/
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