MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 51, no. 3, page. 763 - 766, 2009-03
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 51, no. 3, page. 842 - 845, 2009-03
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 51, no. 2, page. 574 - 577, 2009-02