Qoyyimi, Danang, and Rifki Utama. “ADAPTED PRESTON’S CURVE: A PROXY METHOD FOR LONGEVITY RISK ANALYSIS ON INDONESIAN PENSION PLAN”. BAREKENG: Jurnal Ilmu Matematika dan Terapan 17, no. 2 (June 11, 2023): 0895-0902. Accessed November 22, 2024. https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/7939.