1. Agile & Iterative Development: A Manager's Guide;Larman,2003
2. Agile Software Development: Principles, Patterns and Practices;Martin,2003
3. Agile Estimating and Planning;Cohn,2005
4. Software Cost Estimation and Sizing Methods, Issues and Guidelines;Pfleeger,2005
5. Measuring application development productivity;Albrecht,1979