Progress In Electromagnetics Research Letters, vol. 42, page. 155 - 165, 2013-09
Antennas and Wireless Propagation Letters, vol. 12, no. 1, page. 1037 - 1040, 2013-08
Journal of Electromagnetic Waves and Applications, vol. 27, no. 12, page. 1509 - 1520, 2013-08-01