BARRETT , L. B. . Puts? Calls? Energy Hedges? Complicated Choices. Strategic Planning for Energy and the Environment, [S. l.], v. 21, n. 4, p. 39–46, 2023. Disponível em: https://journals.riverpublishers.com/index.php/SPEE/article/view/20373. Acesso em: 28 apr. 2026.