1. Analysis of aircraft propulsion system failure;Romeyn,2014
2. Roger Ford, “CODE WD, A Look Round Wimbledon Depot” Railways Magazine, October 2010 — Volume 68 Number 745, Available at http://www.modern-railways.com/view_issue.asp?ID=4520
3. Comparing the fatality risks in United States transportation across modes and over time;Savage;Res. Transp. Econ.,2013
4. ATSB—Australian Transport Safety Bureau, “Cross modal safety comparisons discussion paper”,2002
5. EASA, “Annual Safety Review 2013”,ISBN 978-92-9210-187-9 [Available at] http://easa.europa.eu/system/files/dfu/199751_EASA_ASR_2013.pdf