1. The Agile Manifesto,
http://agilemanifesto.org/
2. Martin, R.: Agile Software Development. Prentice-Hall, Englewood Cliffs (2002)
3. Highsmith, J.: Agile Software Development Ecosystems. Addison Wesley, Reading (2002)
4. Kruchten, P.: Contextualizing Agile Software Development. EuroSPI, Grenoble, France, EuroSPI.net, pp. 6.1-12, (September 2010),
http://www.ece.ubc.ca/pubs/kruchten2010contextualizing
5. Cohn, M.: Succeeding with Agile: Software Dev. using Scrum. Addison Wesley, Reading (2009)