Ching-Her Lee, Chung-I G. Hsu, and Yu-Cheng Chen. “DESIGN OF DUAL-BAND BANDPASS FILTER INCORPORATING TRI-SECTION SIRS AND CPW SIRS”. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe) 8, no. 1 (August 1, 2009): 13-18. Accessed September 28, 2020. http://www.jmoe.org/index.php/jmoe/article/view/246.