1. The effect of yeast extract supplementation on the production of lactic acid from whey permeate byLactobacillus helueticus
2. Association of Official Agricultural Chemists. Official methods of analysis of the Association of Official Agricultural Chemists, 12th ed., (ed.), Association of Official Agricultural Chemists, Washington, DC, 1975.
3. Influence of pH, lactose and lactic acid on the growth of Streptococcus cremoris: a kinetic study
4. Bergey's manual of determinative bacteriology, 8th ed. (Williams and Wilkins, Baltimore, 1974).
5. 1983. p. 410 In. p. 410 In: and (eds.), Biotechnology, Energy from reusable resources, Verlag Chemie, Weinheim.