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2. Track Inspector Rail Defect Reference Manual Federal Railroad Administration, Washington, DC. 〈http://www.fra.dot.gov/Elib/Document/2130〉, August 2011.
3. Office of the Rail Regulator, Train Derailment At Hatfield: A Final Report By The Independent Investigation Board, July 2006, UK.
4. Australian Transport Safety Bureau Investigation Report, Rail Occurrence Investigation No. 2007/004 Derailment of Train 6MP9 – Bates, SA, 10 June 2007.
5. Transportation Safety Board of Canada, Railway investigation report R13E0142, Feb. 2016 (see 〈http://www.tsb.gc.ca/eng/rapports-reports/rail/2013/r13e0142/r13e0142.asp〉).