Kumari, D., and K. Rajnish. “Finding Error-Prone Classes at Design Time Using Class Based Object-Oriented Metrics Threshold through Statistical Method”. INFOCOMP Journal of Computer Science, vol. 12, no. 1, June 2013, pp. 49-63, https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/372.