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IEEE Antennas and Wireless Propagation Letters > 2016 > 15 > 1931 - 1934
IEEE Antennas and Wireless Propagation Letters > 2015 > 14 > 333 - 336
IEEE Transactions on Antennas and Propagation > 2014 > 62 > 3 > 1212 - 1220
IEEE Transactions on Antennas and Propagation > 2008 > 56 > 1 > 5 - 10