Herencsar, N., J. Koton, J.-W. Horng, K. Vrba, and M. Venclovsky. “Voltage-Mode CFTA-C Third-Order Elliptic Low-Pass Filter Design and Optimization Using Signal Flow Graph Approach”. Elektronika Ir Elektrotechnika, vol. 21, no. 2, Apr. 2015, pp. 24-29, doi:10.5755/j01.eee.21.2.11508.