Balaišis, P., D. Eidukas, R. Gužauskas, and A. Valinevičius. “Modeling of Efficiency of Dynamic Electronic Systems”. Elektronika Ir Elektrotechnika, vol. 86, no. 6, July 2008, pp. 55-59, https://eejournal.ktu.lt/index.php/elt/article/view/11184.