TOWNSEND, Steve. Friedman’s First Law fails: Oil prices do not predict freedom. The Economics of Peace and Security Journal, [S. l.], v. 4, n. 1, 2009. DOI: 10.15355/epsj.4.1.78. Disponível em: https://www.epsjournal.org.uk/index.php/EPSJ/article/view/93. Acesso em: 29 apr. 2024.