Najiha, Alimatun, Erna Herdiani, and Georgina Tinungki. “THE APPLICATION OF GUMBEL COPULA TO ESTIMATE VALUE AT RISK WITH BACKTESTING IN TELECOMMUNICATION STOCK”. BAREKENG: Jurnal Ilmu Matematika dan Terapan 17, no. 1 (April 16, 2023): 0245-0252. Accessed May 2, 2024. https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/6953.