N. H. Othman Ali, A. E. Admi, S. A. Osman, and S. A. . Osman, “Effect of Coolant Concentration Ratio on Surface Roughness in Machining Aluminium 6061: A Case Study”, J. Adv. Res. Exp. Fluid Mech. Heat Trans., vol. 18, no. 1, pp. 55–68, Jan. 2025.