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A. Gorbenko, V. Popov       The identity checking problem for semigroups       Appl. Math. Sci., Vol. 7, 2013, no. 21-24, 1199-1203       https://doi.org/10.12988/ams.2013.13110
Copyright © 2013 A. Gorbenko and V. Popov. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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