1. National Transportation Safety Board (NTSB), Collapse of I-35W Highway Bridge, Rep. No. PB2008-916203, National Transportation Safety Board, Washington, D.C., (2008).
2. U.S. Department of Transportation (USDOT), National Transportation Statistics, http://www.bts.gov/publications/national_transportation_statistics/, (2009).
3. American Society of Civil Engineers (ASCE), Report Card for America's Infrastructure, http://www.infrastructurereportcard.org/, 2009.
4. An introduction to structural health monitoring;Farrar;Philosophical Transactions of the Royal Society A,2007
5. Dynamic elasticity modulus for low-carbon steel in the climactic temperature range, Central Scientific-Research Institute of designing steel structures;Khanukhov;Moscow, translated from Problemy Prochnosti,1986