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@article{IVM_1983_12_a13, author = {I. O. Koryakov}, title = {Maximal periodic semigroups of second-order matrices}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {69--71}, publisher = {mathdoc}, number = {12}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1983_12_a13/} }
I. O. Koryakov. Maximal periodic semigroups of second-order matrices. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 12 (1983), pp. 69-71. http://geodesic.mathdoc.fr/item/IVM_1983_12_a13/