ФИЛАТОВ, Денис Игоревич. CERTAINTY OF THE WAYS OF HUMAN ACTIVITY. The Bulletin of the Volga Region Institute of Administration, [S. l.], v. 31, n. 2, p. 222–226, 2012. Disponível em: https://volga-institute.owebs.ru/article/view/23628. Acesso em: 8 nov. 2026.