Speed and Direction Angle Control of Four Wheel Drive Skid-Steered Mobile Robot by Using Fractional Order PI Controller. Elektronika ir Elektrotechnika, [S. l.], v. 22, n. 5, p. 14–19, 2016. DOI: 10.5755/j01.eie.22.5.16337. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/16337.. Acesso em: 5 dec. 2025.