Tsirigotis, G., D. Bandekas, D. Pogaridis, and J. L. Lázaro. “Comparative Control of a Nonlinear First Order Velocity System by a”. Elektronika Ir Elektrotechnika, vol. 55, no. 6, Sept. 2004, https://eejournal.ktu.lt/index.php/elt/article/view/10887.