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IEEE Transactions on Knowledge and Data Engineering > 2012 > 24 > 4 > 759 - 768
IEEE Intelligent Systems > 2010 > 25 > 3 > 32 - 40
IEEE Transactions on Knowledge and Data Engineering > 2012 > 24 > 4 > 759 - 768
IEEE Intelligent Systems > 2010 > 25 > 3 > 32 - 40