MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 12, page. 3184 - 3187, 2007-12
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 49, no. 1, page. 199 - 201, 2007-01
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 48, no. 9, page. 1873 - 1876, 2006-09
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 43, no. 6, page. 462 - 467, 2004-12-20