M. A. Asker, K. S. Gaeid, N. N. Tawfeeq, H. K. Zain, A. I. Kauther, and T. Q Abdullah, “Design and Analysis of Robot PID Controller Using Digital Signal Processing Techniques”, IJET, vol. 7, no. 4.37, pp. 103–109, Dec. 2018, doi: 10.14419/ijet.v7i4.37.23625.