1. Brewer, C. R, C. H. Werkman, M. B. Michaelian, and B. W. Hammer. 1938. Effect of aeration under pressure on diacetyl production in butter cultures. Iowa Agr. Exp. Sta., Res. Bull., 233: 43.
2. The mechanism of diacetyl formation in butter starters;DeMann,1956
3. Effect of various bacteria on diacetyl content and flavor in butter;Elliker;J. Dairy Sci.,1945
4. Formation of acetylmethylcarbinol and diacetyl in cultures of lactic acid bacteria;Fedrov;Doklady Akad. Nauk USSR,1955
5. Hammer, B. W. 1921. Sources of flavor in butter. Iowa Agr. Exp. Sta., Res. Bull. 67, Ames, Iowa.