1. To err is human: building a safer health system;Kohn,2000
2. 26th Joseph T. Nall report: General aviation accidents in 2014;Kenny,2015
3. Accident statistics;Kebabjian,2018
4. The role of human causal factors in US Army unmanned aerial vehicle accidents;Manning,2004
5. National motor vehicle crash causation survey: Report to congress;NHTSA,2008