1. American National Standards institute (ANSI)/Compressed Gas Association Requirements for the Storage and Handling of Anhydrous Ammonia 6th Ed. ANSI K61.1/CGA G‐2.1 2014.
2. American National Standards institute (ANSI) ANSI/ISA– 18.2–2009 Management of Alarm Systems for the Process Industries 2009.
3. American Petroleum Institute (API) Fatigue Risk Management Systems for Personnel in the Refining and Petrochemical Industries API RP‐755 2010.
4. American Petroleum Institute (API) Safe Operation of Hydrofluoric Acid Alkylation Units 4th Ed. API RP‐751 2013.
5. Amyotte P Goraya A Hendershot D Khan F. Incorporation of Inherent Safety Principles in Process Safety Management Proceedings of 21st Annual International Conference – Process Safety Challenges in a Global Economy Orlando FL April2006.