COYNE, G. Natural and Unnatural Paths. Journal of World-Systems Research, [S. l.], v. 15, n. 2, p. 228–232, 2009. DOI: 10.5195/jwsr.2009.322. Disponível em: https://jwsr.pitt.edu/ojs/jwsr/article/view/322. Acesso em: 18 jun. 2025.