“Forecasting Rupiah-to-US Dollar Exchange Rate 2020 - 2025 Using a Fuzzy Time Series Markov Chain Model”. Indonesian Actuarial Journal 1, no. 1 (August 5, 2025): 60–72. Accessed September 14, 2025. https://iaj.aktuaris.or.id/index.php/iaj/article/view/28.