Historical overview of the concept of metaphysics. Letras, Lima, Peru, v. 15, n. 42, p. 27–37, 1949. DOI: 10.30920/letras.15.42.3. Disponível em: https://revistaletras.unmsm.edu.pe/index.php/le/article/view/1043. Acesso em: 13 sep. 2026.