Hedging using put options for Brent crude oil contracts. Journal Port Science Research, [S. l.], v. 9, n. 1, p. 167–177, 2026. DOI: 10.36371/port.2026.1.11. Disponível em: https://www.jport.co/index.php/jport/article/view/373. Acesso em: 10 may. 2026.