Xu, Rong, and Xingye Li. 2017. “Study About the Minimum Value at Risk of Stock Index Futures Hedging Applying Exponentially Weighted Moving Average - Generalized Autoregressive Conditional Heteroskedasticity Model”. International Journal of Economics and Financial Issues 7 (6):104-10. https://econjournals.com/index.php/ijefi/article/view/5630.