American option pricing under an extended slow-growth volatility model. Gulf Journal of Mathematics, [S. l.], v. 21, n. 1, p. 234–251, 2025. DOI: 10.56947/gjom.v21i1.3478. Disponível em: https://gjom.org/index.php/gjom/article/view/3478. Acesso em: 22 sep. 2026.