Aldawiyah, N. K., Wulandari, I. Z., Firmanda, A. W., & Mardianto, M. F. F. (2026). Value-at-Risk Analysis of PT Bukit Asam Tbk (PTBA) Stock Returns Based on an ARIMA–GARCH Model with a Student-t Distribution. Jurnal Matematika, Statistika Dan Komputasi, 22(3), 546–559. https://doi.org/10.20956/j.v22i3.49505