AKDI, Y. .; VARLIK, S. .; BERUMENT, H. . The long-run relationship between the prices of WTI and Brent crude oils – Periodogram based cointegration analyses. Energy Economics Letters, [S. l.], v. 10, n. 1, p. 35–43, 2023. DOI: 10.55493/5049.v10i1.4715. Disponível em: https://archive.aessweb.com/index.php/5049/article/view/4715. Acesso em: 26 apr. 2024.