Magdi S. Mahmoud, Nezar M. Alyazidi, and Abdalrahman M. Hassanine. “Modeling and Control of Underactuated Three-Dimensional Overhead Crane Systems”. International Journal of Robotics and Automation Technology 6 (October 8, 2019):   80–85. Accessed May 4, 2024. https://zealpress.com/jms/index.php/ijrat/article/view/242.