Dobrucky, B., M. Benova, M. Frivaldsky, R. Radvan, and D. Gombarska. “Comparative Analysis of (HF) Non-Linear Circuits Modelled by Different Environments”. Elektronika Ir Elektrotechnika, vol. 19, no. 4, Mar. 2013, pp. 15-18, doi:10.5755/j01.eee.19.4.1754.