HERENCSAR, N.; KOTON, J.; HORNG, J.-W.; VRBA, K.; VENCLOVSKY, M. Voltage-Mode CFTA-C Third-Order Elliptic Low-Pass Filter Design and Optimization Using Signal Flow Graph Approach. Elektronika ir Elektrotechnika, [S. l.], v. 21, n. 2, p. 24-29, 2015. DOI: 10.5755/j01.eee.21.2.11508. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/11508. Acesso em: 25 sep. 2022.