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IEEE Access > 2017 > 5 > 27439 - 27452
IEEE Transactions on Antennas and Propagation > 2016 > 64 > 2 > 618 - 629
IEEE Antennas and Wireless Propagation Letters > 2013 > 12 > 233 - 236
IEEE Antennas and Wireless Propagation Letters > 2011 > 10 > 1499 - 1502
IEEE Antennas and Wireless Propagation Letters > 2011 > 10 > 1512 - 1515