Bahtiar, Armin Lawi, Budi Nurwahyu, and Nirwan Ilyas. “Cost-Sensitive Ordinal Gini: Formulation, Structural Properties, and Empirical Evaluation”. Statistics, Optimization & Information Computing (September 19, 2026). Accessed September 25, 2026. https://iapress.org/index.php/soic/article/view/4287.