E. Yildirim and M. A. Cengiz, “Evaluating Value-at-Risk in BIST Using Copula Approach”, IJSBAR, vol. 30, no. 5, pp. 52–62, Dec. 2016, Accessed: Sep. 21, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/6561