MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, vol. 29, no. 4, page. 276 - 280, 2001-05-20
POLYMER, vol. 44, no. 11, page. 3243 - 3249, 2003-05
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, vol. 42, no. 3, page. 640 - 650, 1996-08
POLYMER, vol. 47, no. 8, page. 2670 - 2676, 2006-04-05