Ke Ting, Chong, Noraini Ibrahim, Sharin Hazlin Huspi, and Wan Mohd Nasir Wan Kadir. “A Class Density-Weighted Gain Ratio Feature Selection for Multiclass Student Engagement Classification”. International Journal of Academic Research in Progressive Education and Development 14, no. 4 (October 1, 2025): 186–202. Accessed February 4, 2026. https://ijarped.com/index.php/journal/article/view/3842.