Onyeka-Ubaka, J. N., and O. Abass. “On Optimal Estimate Functions for Asymmetric GARCH Models.”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 20180 (June 18, 2018): 291 - 311. Accessed May 2, 2024. http://ijmso.unilag.edu.ng/article/view/41.