IEEE Antennas and Wireless Propagation Letters
IEEE Antennas and Wireless Propagation Letters > 2016 > 15 > 504 - 507
IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 1476 - 1479
IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 720 - 723
IEEE Antennas and Wireless Propagation Letters > 2017 > 16 > 609 - 612