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IEEE Antennas and Propagation Magazine > 2015 > 57 > 5 > 94 - 106
IEEE Transactions on Power Electronics > 2015 > 30 > 7 > 3952 - 3963
IEEE Transactions on Power Electronics > 2015 > 30 > 7 > 3998 - 4008
IEEE Transactions on Antennas and Propagation > 2015 > 63 > 7 > 2851 - 2857