Jakšić, U., N. Marković, and S. Bjelić. “Inertia (slowness) of Zero Order Components Filter”. Elektronika ir Elektrotechnika 94, no. 6 (July 22, 2009): 99-105. Accessed September 27, 2020. https://eejournal.ktu.lt/index.php/elt/article/view/10116.