1. Websites
2. National Infrastructure Protection Center FBI http://www. calea.org/online/newsletter/No75/The%20National%20 Infrastructure%20Protection%20Center.htm
3. National Infrastructure Simulation and Analysis Center (NISAC) http://www.sandia.gov/nisac/
4. Center For Infrastructure Protection at George Mason University School of Law http://cip. gmu.edu/
5. http://www.dhs.gov/xinfoshare/programs/editorial_0542.shtm