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Annals of Telecommunications > 2006 > 61 > 3-4 > 245-266
IEEE Transactions on Knowledge and Data Engineering > 2011 > 23 > 4 > 612 - 626
IEEE Communications Surveys & Tutorials > 2011 > 13 > 2 > 150 - 167
2010 International Conference on Computer Application and System Modeling (ICCASM 2010) > 10 > V10-521 - V10-525