[http://www2.umassd.edu/SWPI/xp/articles/r6047.pdf Iterative and Incremental Development: A Brief History] by Craig Larman and Victor R. Basili

[http://kanemar.com/2005/11/03/the-staggered-iterative-waterfall-anti-pattern-part-1/ The Staggered-Iterative-Waterfall (Anti-)Pattern] by Kane Mar