A. Basher, E. “The Influence of Double Acting Hydraulic Piston on Tractive Forces for Towing Vehicle on Steering of Wagon Type Articulated Tracked Vehicle(English)”. Al-Rafidain Engineering Journal (AREJ), vol. 20, no. 5, Oct. 2012, pp. 103-18, doi:10.33899/rengj.2012.61044.