1. 2002. The role of commitment in software process improvement. PhD Thesis, University of Oulu, Department of Information Processing Science and Info-tech Oulu.
2. Agile Manifesto. 2006. http://www.agilemanifesto.org/ history.html retrieved on 20.03.2006.
3. 2000. Extreme Programming Explained—Embrace Change. Addison Wesley Longman, Inc.: Reading, MA.