Using garch algorithm to analyze data in R language. Vallis Aurea, [S. l.], v. 5, n. 1, p. 49–56, 2019. DOI: 10.2507/IJVA.5.1.5.59. Disponível em: https://ojs.srce.hr/index.php/vallisaurea/article/view/26456. Acesso em: 19 aug. 2025.