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IEEE Journal of Biomedical and Health Informatics > 2013 > 17 > 3 > 745 - 755
IEEE Communications Surveys & Tutorials > 2012 > 14 > 2 > 240 - 264
IEEE Communications Magazine > 2011 > 49 > 4 > 89 - 95
IEEE Transactions on Electron Devices > 2011 > 58 > 8 > 2406 - 2414