1. Carithers, V. G. and Brown, W. H., Reynolds Metals Company Internal Report, August 1963
2. Sanders, S. R., Reynolds Metals Company Internal Report, April 1979.
3. Chemical Engineers Handbook, 5th ed., McGraw-Hill, New York, pp. 3–69, Perry and Chilton.
4. Ibid. pp. 4–43 to 4–62.
5. Handbook of Chemistry and Physics, 56th ed., p. D-256.