References
- American Society of Brewing Chemists, Report of Subcommittee on Coordination of New and Alternate Methods of Analyses. Proc. 1969, p. 240.
- Dixon, W. J. and Massey, F. J. Jr. Introduction to Statistical Analysis (2nd Ed.) pp. 275–278. McGraw Hill, New York (1957).
- Frey, S. W., Dewitt, W.G., and Bellomy, B. R. Am. Soc. Brewing Chemists, Proc. 1966, p. 172.