ELECTRONICS LETTERS, vol. 37, no. 25, page. 1525 - 1526, 2001-12-06
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 11, no. 6, page. 270 - 272, 2001-06
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 49, no. 6, page. 849 - 854, 2001-06
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 29, no. 4, page. 276 - 280, 2001-05-20