Denano, Tesfaye, and Sintayehu Sibera. 2021. “Application of Autoregressive Conditional Heteroskedasticity (ARCH) Type Models for the Price Volatility of Teff in Ethiopia”. International Journal of Applied Sciences: Current and Future Research Trends 9 (01):1-21. https://ijascfrtjournal.isrra.org/index.php/Applied_Sciences_Journal/article/view/1113.