VICENTE, J. V. M.; GUEDES, T. de S. Does implied volatility contain information about future volatility? Evidence from the Petrobras options market. Brazilian Business Review, [S. l.], v. 7, n. 1, p. 42–58, 2010. DOI: 10.15728/bbr.2010.7.1.3. Disponível em: https://www.bbronline.com.br/index.php/bbr/article/view/359. Acesso em: 24 may. 2022.