KARAEV, A.; PONKRATOV, V.; MASTEROV, A.; KIREEVA, E.; VOLKOVA, M. Cross-country Analysis of the Comparative Efficiency of Government Support for Coal and Lignite Production. International Journal of Energy Economics and Policy, [S. l.], v. 10, n. 5, p. 220–227, 2020. Disponível em: https://www.econjournals.com/index.php/ijeep/article/view/9550. Acesso em: 25 apr. 2024.