Estupiñán, Miguel Ángel, et al. “Awakening of Liberation Spirituality: Evolution of Its Manifestations from Medellín to Puebla ”. Cuestiones Teológicas, vol. 40, no. 94, Dec. 2013, pp. 405-31, https://revistas.upb.edu.co/index.php/cuestiones/article/view/5062.