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IEEE Antennas and Wireless Propagation Letters > 2008 > 7 > 725 - 728
Electronics Letters > 2007 > 43 > 25 > 1458 - 1459
IEEE Antennas and Wireless Propagation Letters > 2008 > 7 > 725 - 728
Electronics Letters > 2007 > 43 > 25 > 1458 - 1459