1. EN378: 2000. Refrigerating systems and heat pumps—safety and environmental requirements. BSI, London, 2000.
2. IEC 60335-2-24: 2000. Safety of household and similar electrical appliances, part 2.24. Refrigerators, freezers and ice-makers. BSI, London, 2000.
3. Guidelines for the safe use of hydrocarbon refrigerants,2000
4. Code of practice for the design on refrigeration systems using A3 refrigerants,2000
5. A review of some mixing experiments relevant to dense gas dispersion;Britter,1988