Viktoria V. Borisova, E. E. P., L. N. D. Alexander E. Ushanov, L. N. D. Alexander E. Ushanov, and M. S. Maramygin. “The Assessment and Management of Credit Risk of Commercial Banks”. Opción, Vol. 35, 1, pp. 613-27, https://produccioncientifica.luz.edu.ve/index.php/opcion/article/view/30140.