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IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 2278 - 2282
IEEE Antennas and Wireless Propagation Letters > 2013 > 12 > 906 - 909
IEEE Transactions on Antennas and Propagation > 2011 > 59 > 9 > 3473 - 3477
IEEE Sensors Journal > 2009 > 9 > 8 > 953 - 960
IEEE Sensors Journal > 2008 > 8 > 7 > 1256 - 1263