KELKAY, B. D.; G/YOHANNES, E. The Application of Garch Family Models for Agricultural Crop Products in Amhara Region, Ethiopia. Journal of Science, Technology and Arts Research, [S. l.], v. 3, n. 4, p. 49–58, 2014. Disponível em: https://journals.wgu.edu.et/index.php/star/article/view/465. Acesso em: 23 sep. 2024.