Farago, P., L. Festila, S. Hintea, G. Csipkes, D. Csipkes, and P. Soser. “A Transistor-Level Reconfigurable Circuit for Rapid Transconductor Design and Testing”. Elektronika Ir Elektrotechnika, vol. 117, no. 1, Jan. 2012, pp. 99-104, doi:10.5755/j01.eee.117.1.1062.