1. Guidelines for hazard evaluation procedures;Center for Chemical Process Safety (CCPS),1996
2. Guidelines for chemical process quantitative risk analysis;Center for Chemical Process Safety (CCPS),2000
3. Layer of protection analysis – Simplified process risk assessment;Center for Chemical Process Safety (CCPS),2001
4. Chan, T. L. (2008). Inherent safety intervention framework. Ph.D. thesis, Universiti Teknologi PETRONAS, Malaysia.