1. Measuring the concentration of a flowing oil-refrigerant mixture with an acoustic velocity sensor;Baustian;ASHRAE Trans,1988
2. Effect of dissolved air on the speed of sound in water;Greenspan;J Acoust Soc Am,1959
3. Speed of sound in pure water;Del Grosso;J Acoust Soc Am,1972
4. Electronic pulse method for measuring the velocity of sound in liquids and solids;Cedrone;J Acoust Soc Am,1954
5. The effects of oil on the thermodynamic properties of dichlorodifluoromethane (R12) and tetrafluoroethane (R134a);Grebner,1992