1. MacDonald, I. A., JAOCS 45:484A (1968).
2. “Official and Tentative Methods of the American Oil Chemists’ Society,” Third edition, AOCS, Champaign, III., Revised to 1970.
3. “Cereal Laboratory Methods,” Seventh edition, American Association of Cereal Chemists’ Society, St. Paul, Minn. 1962.
4. “Offical Methods of Analysis,” 11th edition, Association of Official Analytical Chemists, Washington, D.C., 1970.
5. U.S. National Research Council, Food Protection Committee, “Food Chemical Codex.”