1. Li, T.: An Approach to Modelling and Describing Software Evolution Processes. Ph.D. Thesis, De Montfort University, UK2 (February 2007)
2. Yang, H., Ward, M.: Successful Evolution of Software System. Artech House, Norwood (2003)
3. Lecture Notes in Computer Science;M.M. Lehman,1996
4. Aoyama, M.: Continuous and Discontinuous Software Evolution: Aspects of Software Evolution across Multiple Product Lines. In: Proc. 4th International Workshop on Principles of Software Evolution, pp. 87–90. ACM Press, New York (2001)
5. Chatters, B.W., et al.: Modelling a Software Evolution Process: a Long-Term Case Study. Journal of Software Process: Improvement and Practice 5(2-3), 95–102 (2000)