1. Status Report on Software Measurement;Pfleeger;IEEE Software,March/April 1997
2. A Review of Studies on Expert Estimation of Software Development Effort;Jørgensen;Journal of Systems and Software,February 2004
3. Why Does Software Cost So Much;DeMarco;IEEE Software,March 1993
4. A General Empirical Solution to the Macro Software Sizing and Estimation Problem;Putnam;IEEE Transactions on Software Engineering,July 1978