Akdi, Y. , Varlik, S. and Berument, H. 2023. The long-run relationship between the prices of WTI and Brent crude oils – Periodogram based cointegration analyses. Energy Economics Letters. 10, 1 (Jan. 2023), 35–43. DOI:https://doi.org/10.55493/5049.v10i1.4715.