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IEEE Systems Journal > 2017 > 11 > 2 > 588 - 599
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 377 - 396
IEEE Communications Magazine > 2015 > 53 > 3 > 182 - 188
IEEE Communications Magazine > 2015 > 53 > 1 > 142 - 149
IEEE Communications Letters > 2013 > 17 > 8 > 1656 - 1659