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IEEE Transactions on Antennas and Propagation > 2016 > 64 > 2 > 805 - 810
IEEE Antennas and Wireless Propagation Letters > 2016 > 15 > 556 - 559
IEEE Transactions on Microwave Theory and Techniques > 2015 > 63 > 9 > 2867 - 2876
IEEE Antennas and Wireless Propagation Letters > 2015 > 14 > 261 - 264
IEEE Antennas and Wireless Propagation Letters > 2014 > 13 > 31 - 34
IEEE Transactions on Antennas and Propagation > 2011 > 59 > 7 > 2532 - 2537