Aulas, A., R. Vadoklis, V. Dangelas, A. Kiseliov, M. Chusnutdinov, and I. Mazurkevič. “Promising Method of IC Operation Speed Testing at the Production Based on 3-Rd Harmonic Measurement”. Elektronika Ir Elektrotechnika, vol. 94, no. 6, July 2009, pp. 106-8, https://eejournal.ktu.lt/index.php/elt/article/view/10117.