Benefits and Costs of the USA Coal Research, Development, and Demonstration Program. European Journal of Energy Research, [S. l.], v. 1, n. 2, p. 30–37, 2021. DOI: 10.24018/ejenergy.2021.1.2.12. Disponível em: https://ej-energy.org/index.php/ejenergy/article/view/12. Acesso em: 11 oct. 2025.