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IEEE Transactions on Knowledge and Data Engineering > 2010 > 22 > 8 > 1077 - 1092
IEEE Transactions on Professional Communication > 2013 > 56 > 1 > 50 - 66
Proceedings of the IEEE > 2008 > 96 > 4 > 589 - 601
IEEE Intelligent Systems > 2008 > 23 > 6 > 14 - 18