Literature Cited
- American Society of Brewing Chemists. Methods of Analysis, 7th ed. Beer 23 Beer bitterness. The Society: St. Paul MN, 1976.
- Brenner, M. W., Vigilante, S., and Owades, J. K. A study of hop bitters (isohumulones) in beer. Am. Brew. 89(Dec.):40–46, 72–73, 1956.
- Rigby, F. L., and Bethune, J. L. Rapid methods for the determination of total hop bitter substances (iso- compounds) in beer. J. Inst. Brew. 61:325–332, 1955.