1. European Parliament and Council 1994 The Explosive Atmosphere
2. European Parliament and Council 1999 Minimum Requirements for Improving the Safety and Health of Workers Potentially at Risk from Explosive Atmospheres
3. National Fire Protection Association (NFPA) 2007 Guide for Venting of Deflagrations
4. New Zealand Government 2001 Hazardous Substances (Classes 1 to 5 controls) Regulations