Ighravwe, Desmond Eseoghene, and Sunday Ayoola Oke. “Surface Roughness Prediction and Optimisation Using Novel Joint Artificial Neural Network and Bat Algorithm”. International Journal of Integrated Engineering, vol. 14, no. 4, June 2022, pp. 20-34, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/5721.