PEREIRA, D. A “Dark Root” of Global History: Contributions made by Oswald Spengler and Arnold Toynbee. Brazilian Journal of International Relations, Marília, SP, v. 10, n. 3, p. 677–698, 2021. DOI: 10.36311/2237-7743.2021.v10n3.p677-698. Disponível em: https://revistas.marilia.unesp.br/index.php/bjir/article/view/11073. Acesso em: 29 mar. 2024.