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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 50, no. 11, page. 2836 - 2839, 2008-11
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 11, page. 2838 - 2841, 2007-11
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 10, page. 2552 - 2555, 2007-10
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IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 53, no. 2, page. 786 - 793, 2005-02