1. Estimating Software-Intensive Systems;Stutzke,2005
2. Software Cost Estimation with COCOMO II;Boehm,2000
3. Social Technology;Helmer,1996
4. isee systems, Inc. iThink (system dynamics simulation tool), 2006. Available from .
5. S. Chulani, Results of Delphi for the Defect Introduction Model, Technical Report (USC-CSE-97-505), CS Department, University of Southern California, Los Angeles, CA, 1997.