Dwipayana, Made Yudi, Gede Angga Pradipta, and Dandy Pramana Hostiadi. “Safety-Oriented Air Quality Index Classification for Imbalanced Data Using Optimized Boosting Models With Optuna and Oversampling ”. TIERS Information Technology Journal 7, no. 1 (July 28, 2026): 17-31. Accessed July 28, 2026. https://journal.undiknas.ac.id/index.php/tiers/article/view/7558.