1. Columbia Accident Investigation Board Volume I – VI Government Printing Office 2003.
2. OSHA United States Department of Labor https://www.whistleblowers.gov/
3. Survival Techniques for the Practicing Engineer
4. Ayub M.(2019).Investigation of March 15 2018 Pedestrian Bridge Collapse at Florida International University Miami FL. OSHA.
5. Marshall R.D.et al. Investigation of the Kansas City Hyatt Regency Walkways Collapse NBS Building Science Series14‐3 May 1982.