PALA, A. Structural Breaks, Cointegration, and Causality by VECM Analysis of Crude Oil and Food Price. International Journal of Energy Economics and Policy, [S. l.], v. 3, n. 3, p. 238–246, 2013. Disponível em: https://www.econjournals.com/index.php/ijeep/article/view/486. Acesso em: 4 oct. 2022.