MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 12, page. 3184 - 3187, 2007-12
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 7, page. 1764 - 1768, 2007-07
IET MICROWAVES ANTENNAS & PROPAGATION, vol. 1, no. 1, page. 248 - 254, 2007-02
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 1, page. 199 - 201, 2007-01