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IET Circuits, Devices & Systems > 2015 > 9 > 3 > 213 - 220
Electronics Letters > 2014 > 50 > 17 > 1194 - 1195
IEEE Transactions on Circuits and Systems I: Regular Papers > 2014 > 61 > 5 > 1566 - 1577
IEEE Journal of Selected Topics in Quantum Electronics > 2011 > 17 > 2 > 377 - 383