1. Thermodynamic analysis of R22-DMF compression-absorption heat pump;George;Heat Recovery Systems & CHP,1989
2. Thermodynamic properties of R22/E181;Kriebel;Kaltetechnik,1965
3. Physical properties of hydrocarbons: Part 38—Miscellaneous nitrogen compounds;Gallent;Hydrocarbon Processing,1969
4. Thermodynamic and physical properties of R22,1981