1. Preserving Earth’s Stratosphere;Newman;ASME Journal,1998
2. Theoretical analysis of replacement refrigerants for R-22 for residential uses;Radermacher;ASHRE Transactions,1993
3. Refrigeration and Air Conditioning Technology: Concepts, Procedures and Trouble Shooting Techniques;Whitman,1988
4. Flamability of alternative refrigerants;Richards;ASHRE Journal V,1992
5. T.J. Ritter, Flamability-hydrocarbon refrigerants, in: Proceedings of the Institute of Refrigeration Conference, Safe and Reliable Refrigeration, London, 1996