Tiovanny, A., Yanti, M. and Hasibuan, C. D. (2026) “Stochastic Interest Rate Models in Pension Fund Valuation: A Comparative Study of Vasicek and Cox-Ingersoll-Ross under the Aggregate Cost Method”, Journal of Research in Mathematics Trends and Technology, 8(1). doi: 10.32734/jormtt.v8i1.22753.