MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 53, no. 10, page. 2207 - 2212, 2011-10
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, vol. 25, no. 14/15, page. 1930 - 1939, 2011-08
ELECTRONICS LETTERS, vol. 47, no. 13, page. 736 - U18, 2011-06-23
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 53, no. 2, page. 445 - 447, 2011-02