“Forecasting Rupiah-to-US Dollar Exchange Rate 2020 - 2025 Using a Fuzzy Time Series Markov Chain Model” (2025) Indonesian Actuarial Journal, 1(1), pp. 60–72. Available at: https://iaj.aktuaris.or.id/index.php/iaj/article/view/28 (Accessed: 2 November 2025).