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IEEE Access > 2016 > 4 > 10228 - 10234
IEEE Transactions on Antennas and Propagation > 2014 > 62 > 3 > 1147 - 1156
IEEE Communications Surveys & Tutorials > 2013 > 15 > 1 > 255 - 270
IEEE Access > 2016 > 4 > 10228 - 10234
IEEE Transactions on Antennas and Propagation > 2014 > 62 > 3 > 1147 - 1156
IEEE Communications Surveys & Tutorials > 2013 > 15 > 1 > 255 - 270