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@article{IVM_1972_10_a11, author = {L. V. Potemkin}, title = {Semigroup rings of symmetric transformation semigroups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {63--74}, publisher = {mathdoc}, number = {10}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1972_10_a11/} }
L. V. Potemkin. Semigroup rings of symmetric transformation semigroups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1972), pp. 63-74. http://geodesic.mathdoc.fr/item/IVM_1972_10_a11/