Code churn, Code delta, Impact analysis, Rate of change, Software evolution, Software metric, Software product line
Journal of Systems and Software
Department of Systems and Computer Engineering

Ajila, S, & Dumitrescu, R.T. (Razvan T.). (2007). Experimental use of code delta, code churn, and rate of change to understand software product line evolution. Journal of Systems and Software, 80(1), 74–91. doi:10.1016/j.jss.2006.05.034