1. Improving early estimates–best practices guide;Oberlender,1998
2. Transportation Infrastructure: Cost and Oversight Issues on Major Highway and Bridge Projects;GAO,2002
3. Underestimating costs in public works projects — error or lie?;Flyvbjerg;Journal of the American Planning Association,2002
4. Preliminary estimating for heavy construction;Sanders;AACE Transactions,1992
5. Project Cost Estimating: A Synthesis of Highway Practice, National Cooperative Research Program;Schexnayder,2003