Ratchagit, Manlika. “An Improved Weight Optimization of Hybrid Machine Learning Models for Forecasting Daily PM<sub>2.5</Sub> Concentration”. Contemporary Mathematics 5, no. 3 (September 20, 2024): 3953–3970. Accessed April 8, 2025. https://ojs.wiserpub.com/index.php/CM/article/view/5131.