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IEEE Communications Surveys & Tutorials > 2016 > 18 > 2 > 974 - 987
IEEE Antennas and Wireless Propagation Letters > 2016 > 15 > 1365 - 1368
IEEE Transactions on Antennas and Propagation > 2015 > 63 > 12 > 5791 - 5798
IEEE Antennas and Wireless Propagation Letters > 2015 > 14 > 735 - 738
IEEE Antennas and Wireless Propagation Letters > 2015 > 14 > 1294 - 1297
IEEE Communications Surveys & Tutorials > 2015 > 17 > 3 > 1738 - 1760
IEEE Transactions on Antennas and Propagation > 2014 > 62 > 3 > 1416 - 1424