Ching-Her Lee, Chung-I G. Hsu, and Yu-Cheng Chen. 2009. “DESIGN OF DUAL-BAND BANDPASS FILTER INCORPORATING TRI-SECTION SIRS AND CPW SIRS”. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe) 8 (1):13-18. http://www.jmoe.org/index.php/jmoe/article/view/246.