1. Bergmeyer, H. U. (1984), Methods of Enzymatic Analysis, 3rd ed., Verlag Chimie, Weinheim, Germany.
2. Whitaker, J. R. (1991), Food Enzymology, Elsevier Applied Science, NY.
3. Godfrey, T. and West, S. (1996), Industrial Enzymology, 2nd ed. MacMillan Press, London.
4. White, J. (1954), Yeast Technology, Chapman and Hall, London.
5. Wise, W. S. (1951), J. Gen. Microbiol.
5, 167–177.