Gómez Naranjo LG, Borraez Álvarez AF. NOTES ON THE INFORMAL ECONOMY CASE MEDELLIN. Semest. Econ. [Internet]. 2014 Dec. 19 [cited 2026 Apr. 17];8(15):31-46. Available from: https://revistas.udem.edu.co/index.php/economico/article/view/1108