“Effect of Lubrication on Gear Efficiency: Experimental Investigation of Power Losses in a Spur Gear Pair” (2026) American Journal of Engineering , Mechanics and Architecture (2993-2637), 4(5), pp. 16–27. Available at: https://grnjournal.us/index.php/AJEMA/article/view/9447 (Accessed: 9 May 2026).