Ťapák, Peter, and Mikuláš Huba. “Developing E-Course Robust Constrained PID Control”. International Journal of Emerging Technologies in Learning (iJET) 6, no. S1 (April 30, 2011): pp. 27–30. Accessed April 27, 2024. https://online-journals.org/index.php/i-jet/article/view/1622.