Oliveira , João, Rivanildo Almeida, Carlos Monteiro, Herik Bezerra, José Silva, and Neicimar Silva. 2017. “Control Plant Generic PID Controllers Using the Second Tuning Method Ziegler-Nichols”. ITEGAM-JETIA 2 (8). http://br940.teste.website/~itegamjetia/journal/index.php/jetia/article/view/151.