1. US Nuclear Regulatory Commission 1990 Severe Accident Risks: An Assessment for Five US Nuclear Power Plants Report NUREG-1150 Washington, DC
2. On the quantitative definition of risk;Kaplan;Risk Anal.,1981
3. SAPHIRE http://saphire.inel.gov http://www.absconsulting.com/riskmansoftware/index.html http://www.relcon.se/