Akpudo, Ugochukwu, and Jang-Wook Hur. “A Deep Learning Approach to Prognostics of Rolling Element Bearings”. International Journal of Integrated Engineering 12, no. 3 (February 3, 2020): 178-186. Accessed June 25, 2021. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5346.