The philosophy of order and freedom and its practical influence. Letras, Lima, Peru, v. 5, n. 13, p. 192–196, 1939. DOI: 10.30920/letras.5.13.4. Disponível em: https://revistaletras.unmsm.edu.pe/index.php/le/article/view/1072. Acesso em: 13 sep. 2026.