Khairani N, Elfitra E, Siregar TM. Building an E-Learning System Calculating Pension Funds Using the Cox Ingersoll Ross Interest Rate Model. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2025 Feb. 28 [cited 2025 Dec. 8];11(2):742-51. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/10198