Alhimdani, Fahim, Munaf Fathi Badr, and Abeer Hashim. “A Theoretical Method for Calculating the Required Force in Front of a Bulldozer- Blade”. Journal of Engineering and Sustainable Development 13, no. 3 (September 1, 2009): 128–138. Accessed April 20, 2025. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1537.