Gil Leon, J. M., D. E. Castellanos Castellanos, and D. L. Gonzalez Rodriguez. “Intermediation Margin and Banking Concentration in Colombia: An Analysis for the Period 2000-2017”. ECONÓMICAS CUC, vol. 40, no. 2, June 2019, pp. 9-30, doi:10.17981/econcuc.40.2.2019.01.