ARBOLEDA MORA, Carlos. Half Century of Ecumenism: Challenges for the Future. Cuestiones Teológicas, [S. l.], v. 40, n. 93, p. 231–242, 2013. Disponível em: https://revistas.upb.edu.co/index.php/cuestiones/article/view/5116. Acesso em: 4 jun. 2026.