DERMECHI, F.; TAMMAR, A. Russo-British Geopolitical Conflict and Pound Sterling Volatility: Estimation Using an EGARCH-X Model. Journal of Risk Analysis and Crisis Response, [S. l.], v. 15, n. 3, p. 18, 2025. Disponível em: https://jracr.com/index.php/jracr/article/view/646. Acesso em: 17 may. 2026.