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IEEE Communications Surveys & Tutorials > 2014 > 16 > 2 > 1114 - 1134
IEEE Communications Surveys & Tutorials > 2013 > 15 > 3 > 1425 - 1476
IEEE Communications Surveys & Tutorials > 2014 > 16 > 2 > 1114 - 1134
IEEE Communications Surveys & Tutorials > 2013 > 15 > 3 > 1425 - 1476