Hasan Mohammed Nooruldeen, “Effect of Lubrication on Gear Efficiency: Experimental Investigation of Power Losses in a Spur Gear Pair”, AJEMA, vol. 4, no. 5, pp. 16–27, May 2026, Accessed: Oct. 21, 2026. [Online]. Available: https://www.grnjournal.us/index.php/AJEMA/article/view/9447