GURRIB, I.; ELSHARIEF, E.; KAMALOV, F. The Effect of Energy Cryptos on Efficient Portfolios of Key Energy Listed Companies in the S&P Composite 1500 Energy Index. International Journal of Energy Economics and Policy, [S. l.], v. 10, n. 2, p. 179–193, 2020. Disponível em: https://econjournals.com/index.php/ijeep/article/view/8676. Acesso em: 18 apr. 2024.