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IEEE Antennas and Wireless Propagation Letters > 2011 > 10 > 111 - 114
IEEE Sensors Journal > 2011 > 11 > 12 > 3139 - 3152
IEEE Antennas and Wireless Propagation Letters > 2011 > 10 > 111 - 114
IEEE Sensors Journal > 2011 > 11 > 12 > 3139 - 3152