Travers, K. J., C. C. Mcknight, and J. A. Dossey. “Using Statistical Indicators to Monitor the Quality of Undergraduate Mathematics Education Programs”. CUBO, A Mathematical Journal, vol. 3, no. 1, Jan. 2001, pp. 78–101, https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1744.