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Jing Zhao, Luoshan Xu       Existence conditions for finite reduction of knowledge       Int. Journal of Contemp. Math. Sciences, Vol. 8, 2013, no. 14, 667-674
      http://dx.doi.org/10.12988/ijcms.2013.3566
Copyright © 2013 Jing Zhao and Luoshan Xu. This is an open access article 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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