ŠULČIUS, N.; GELEŽEVIČIUS, V. A. Investigation of Velocity Control System with Programmable Variable Structure Controller. Elektronika ir Elektrotechnika, [S. l.], v. 77, n. 5, p. 53-56, 2007. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10740. Acesso em: 29 sep. 2020.