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IEEE Transactions on Knowledge and Data Engineering > 2013 > 25 > 2 > 461 - 475
IEEE Transactions on Knowledge and Data Engineering > 2012 > 24 > 3 > 520 - 532
IEEE Transactions on Knowledge and Data Engineering > 2013 > 25 > 2 > 461 - 475
IEEE Transactions on Knowledge and Data Engineering > 2012 > 24 > 3 > 520 - 532