syuradi, Syuradi, Neva Satyahadewi, and Hendra Perdana. “Determination of the Annual Pension Fund Premium for Joint-Life Status Using the Aggregate Cost Method”. Pattimura International Journal of Mathematics (PIJMath) 2, no. 2 (November 15, 2023): 71-78. Accessed December 4, 2024. https://ojs3.unpatti.ac.id/index.php/pijmath/article/view/9993.