1. IEEE Software: Process Diversity (July-August 2000)
2. Encyclopedia of Software Engineering;V.R. Basili,1994
3. Shewhart, W.A.: The Economic Control of Quality of Manufactured Product. D. Van Nostrand Company, New York (1931), reprinted by ASQC Quality Press, Milwaukee, Wisconsin (1980)
4. Shewhart, W.A.: Statistical Method from the Viewpoint of Quality Control. Dover Publications, Mineola (1939), republished (1986)
5. Ebenau, R.G.: Predictive Quality Control with Software Inspections. Crosstalk (June 1994)