Oliveira , J., R. Almeida, C. Monteiro, H. Bezerra, J. Silva, and N. Silva. “Control Plant Generic PID Controllers Using the Second Tuning Method Ziegler-Nichols”. ITEGAM-JETIA, Vol. 2, no. 8, Dec. 2017, http://br940.teste.website/~itegamjetia/journal/index.php/jetia/article/view/151.