ROLDÁN SÁNCHEZ, Carlos Andrés. ¿What is Thinking about man?. Pensamiento Humanista Journal, Medellin, CO, n. 10, p. 11–12, 2013. Disponível em: https://revistas.upb.edu.co/index.php/pensamiento-humanista/article/view/10101. Acesso em: 17 aug. 2026.