1. Boehm, Barry and Turner, Richard, Balancing Agility and Discipline—A Guide for the Perplexed, New York: Addison-Wesley, 2003, p. 4
2. Standish Group, http://standishgroup.com/newsroom/chaos_2009.php
3. Capella, Jamie, Presentation to PMI MassBay Chapter, March 18, 2010
4. Highsmith, Jim, Agile Project Management: Creating Innovative Products, New York: Addison-Wesley, 2010, p. 18
5. PMI MassBay Chapter Meeting, March 18, 2010
6. Highsmith, Jim, Agile Project Management-Creating Innovative Products, New York: Addison-Wesley, 2010, p. 27