1. Application guide (AG 31-007) – refrigerants;McQuay Co. Ltd,2002
2. History of the organic fluorine industry. Kirk-Othmer encyclopedia of chemical technology;Downing,1966
3. Development of chlorofluorocarbon refrigerant;Downing;ASHRAE Trans,1984
4. Fluorochemicals as working fluids for small Rankine cycle power units;Ray;Adv Energy Convers,1966
5. The Montreal protocol on substances that deplete the ozone layer;Ozone Secretariat, United Nations Environment Programme,2000