Ismail, Muhamad Firdaus, Suhaimi Mohd Daud, Mujahid Mohamad, and Muhammad Sharfi Najib. “Investigation and Classification of Unpleasant Odor in Restroom Using Intelligent Signal Processing Technique”. Journal of Advancement in Environmental Solution and Resource Recovery 3, no. 1 (June 30, 2026): 17–25. Accessed July 22, 2026. https://publisher.uthm.edu.my/ojs/index.php/jaesrr/article/view/17750.