M. K. . Effendi, B. O. P. . Soepangkat, R. . Norcahyo, Suhardjono, and Sampurno, “Cutting Force and Surface Roughness Optimizations in End Milling of GFRP Composites Utilizing BPNN-Firefly Method”, ijie, vol. 13, no. 7, pp. 297–306, Sep. 2021, Accessed: May 08, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/7924