Vega Monsalve, N. D. C., A. M. Pinzón Salgado, C. M. Álvarez Giraldo, and H. M. Serna Gómez. “Role of Human Management Processes Numerical Flexibility in Colombian Organizations”. AD-Minister, no. 25, Nov. 2014, pp. 139-64, https://publicaciones.eafit.edu.co/index.php/administer/article/view/2482.