Shummar, Mohamed, A. F. Kheiralla, and Mohamed Abaker. “Development and Calibration of an Integrated Thin Ring Drawbar Pull Transducer for Agricultural Tractor”. University of Khartoum Engineering Journal 2, no. 1 (November 14, 2022). Accessed September 4, 2025. https://uofkej.uofk.edu/index.php/uofkej/article/view/104.