Nugroho, Didit Budi, Veny M. Ningtyas, and Hanna A. Parhusip. “Evaluating the Fitting Performance of AGARCH(1,1), NAGARCH(1,1), and VGARCH(1,1) Models”. (IJCSAM) International Journal of Computing Science and Applied Mathematics 9, no. 2 (November 15, 2023): 44–49. Accessed January 30, 2026. https://journal.its.ac.id/index.php/ijcsam/article/view/4648.