Jaikla, Winai, and Montree Siripruchyanun. 2012. “A Single-Output Digitally Programmable Current-Mode Universal Biquad Filter Using Current-controlled Current Conveyors (CCCII)”. Engineering and Applied Science Research 34 (2):151-62. https://ph01.tci-thaijo.org/index.php/easr/article/view/1810.