1. Asahi Glass Japanese Patent Applications 1–128942, 1–132537, 1–132538 (1989).
2. Bivens, D.B., Gorski, R.A., Wells, W.D., Yokoseki, A., Lindstrom, R.A., and Shimon, R.L. (1989) ‘Evaluation of Fluorocarbon Blends as Automotive Air Conditioning Refrigerants’, SAE Paper No. 890306
3. Bateman, D.J., Bivens, D.B., Gorski, R.A., Wells, W.D., Lindstrom, R.A., Morse, R.L. and Shimon, R.L., (1990) ‘Refrigerant Blends for the Automotive Air Conditioning Aftermarket’, SAE 900216.
4. Daikin Great Britain Patent 2,030,981 (1978).
5. Dow U.S. Patent 2,885,427 (1959).