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IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 681 - 684
IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 465 - 468
IEEE Transactions on Antennas and Propagation > 2016 > 64 > 9 > 4064 - 4068
IEEE Transactions on Antennas and Propagation > 2011 > 59 > 1 > 339 - 342
IEEE Antennas and Wireless Propagation Letters > 2002 > 1 > 1 > 190 - 192