Continuity estimate of the optimal exercise boundary with respect to volatility for the american foreign exchange put option. Journal of Prime Research in Mathematics, [S. l.], v. 8, n. 1, p. 85 – 94, 2012. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/83. Acesso em: 4 feb. 2026.