Herencsar, Norbert, Jaroslav Koton, Jiun-Wei Horng, Kamil Vrba, and Martin Venclovsky. “Voltage-Mode CFTA-C Third-Order Elliptic Low-Pass Filter Design and Optimization Using Signal Flow Graph Approach”. Elektronika ir Elektrotechnika 21, no. 2 (April 9, 2015): 24-29. Accessed September 26, 2022. https://eejournal.ktu.lt/index.php/elt/article/view/11508.