Morphology of History and Culture: V.N. Ilyin, O. Spengler and A.J. Toynbee. Voprosy Filosofii, [S. l.], n. 5, p. 97–107, 2026. DOI: 10.21146/0042-8744-2023-5-97-107. Disponível em: https://pq.iphras.ru/article/view/8689.. Acesso em: 5 nov. 2026.