“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, no. 3 (May 14, 2026): 546–559. Accessed August 3, 2026. https://journal-598.unhas.ac.id/index.php/jmsk/article/view/49505.