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IEEE Internet Computing > 2012 > 16 > 1 > 13 - 23
IEEE Transactions on Knowledge and Data Engineering > 2009 > 21 > 3 > 384 - 400
IEEE Internet Computing > 2012 > 16 > 1 > 13 - 23
IEEE Transactions on Knowledge and Data Engineering > 2009 > 21 > 3 > 384 - 400