R. H. Herrera-Mercado and R. A. Zambrano-Vanegas, “Systematization of a Strategy of Informal Education Implemented with Inmates of a Medium Security Penitentiary Establishment in Barranquilla, Colombia”, Prospectiva, no. 31, pp. 241–257, Jan. 2021, doi: 10.25100/prts.v0i31.10491.