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Proceedings of the IEEE > 2011 > 99 > 7 > 1183 - 1188
IEEE Communications Surveys & Tutorials > 2010 > 12 > 4 > 504 - 518
Proceedings of the IEEE > 2011 > 99 > 7 > 1183 - 1188
IEEE Communications Surveys & Tutorials > 2010 > 12 > 4 > 504 - 518