V.VIJAYAN3, R.C.P, G. A. P. Design Of Pid Controller With Compensator Using Direct Synthesis Method For Unstable System. International Journal of Engineering and Computer Science, india, v. 5, n. 4, 2017. Disponível em: http://ijecs.in/index.php/ijecs/article/view/878. Acesso em: 5 may. 2024.