1. Hoffman, C., Dalby, G. und Schweitzer, T.R. (Ward Bakmg Company, New York): Process for inhibition of mold. U.S. Patent 2154449
2. Watkins, E.J.: Ropiness in flour and bread and its detection and prevention. J. Soc. Chem. Ind. (London) 25, 350–357 (1906)
3. Lück, E., Oeser, H., Remmert, K.-H. und Sabel, J.: Über das Nichtvorkommen von Propionsäure in Roggen- und Mischbrot. Z. Lebensm. Unters. Forsch. 158, 27–29 (1975)
4. Food and Drug Research Laboratories, Inc.: Scientific literature reviews on Generally Recognized as Safe (GRAS) food ingredients — propionates and thiodipropionates. PB-228–538. Springfield: National Technical Information Service. US Department of Commerce 1974
5. Hara, S. et al.: Pharmacological and toxic actions of propionates. Examination of general pharmacological actions and toxicity of sodium and calcium propionates. Tokyo Ika Daigaku Zasshi 21, 261–302 (1963)