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IEEE Transactions on Plasma Science > 2009 > 37 > 4-2 > 615 - 619
Electronics Letters > 1971 > 7 > 17 > 495 - 496
IEEE Transactions on Plasma Science > 2009 > 37 > 4-2 > 615 - 619
Electronics Letters > 1971 > 7 > 17 > 495 - 496