1. Characteristics of refrigerants;Downing,1963
2. Fujimura, Y. et al. Gas engine heat pumps - features and applications. Komatsu Technical Report, 1983, Komatsu, Japan.
3. Introduction to Heat Transfer;Butterworth,1977
4. ASHRAE Handbook, Fundamentals, Chapter 2. Published by the American Society of Heating, Refrigerating & Air-Conditioning Engineers Inc., New York, 1977.
5. ASHRAE Handbook, Systems, Chapter 26. Published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc., New York 1976.