Stein, Cara, Letha Etzkorn, Sampson Gholston, Phillip Farrington, and Julie Fortune. 2006. “A Knowledge-Based Cohesion Metric for Object-Oriented Software”. INFOCOMP Journal of Computer Science 5 (4):44-53. http://177.105.60.18/index.php/infocomp/article/view/153.