“Optimization of Drilling Parameter and Surface Roughness using different Tool Material by Drilling of CFRP Composite Material”, Int. J. Curr. Eng. Technol., vol. 4, no. 4, pp. 2570–2576, Aug. 2014, Accessed: Apr. 11, 2026. [Online]. Available: https://ijcet.evegenis.org/index.php/ijcet/article/view/1085