Stein, C., L. Etzkorn, S. Gholston, P. Farrington, and J. Fortune. “A Knowledge-Based Cohesion Metric for Object-Oriented Software”. INFOCOMP Journal of Computer Science, vol. 5, no. 4, Dec. 2006, pp. 44-53, https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/153.