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IET Circuits, Devices & Systems > 2017 > 11 > 2 > 123 - 134
IEEE Transactions on Circuits and Systems I: Regular Papers > 2017 > 64 > 3 > 516 - 527
IET Circuits, Devices & Systems > 2017 > 11 > 2 > 103 - 112
IET Microwaves, Antennas & Propagation > 2017 > 11 > 3 > 410 - 416