D. E. Ighravwe and S. Ayoola Oke, “Surface Roughness Prediction and Optimisation using Novel Joint Artificial Neural Network and Bat Algorithm”, ijie, vol. 14, no. 4, pp. 20–34, Jun. 2022, Accessed: May 19, 2024. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/5721