1. Dixon, M., and C. E. Webb: Enzymes, p. 21. Academic Press Inc. (1958).
2. Herbert, D.: Continuous culture of microorganisms; some theoretical aspects. In: Continuous Cultivation of Microorganisms; A Symposium, p. 45?52. Prague: Czechoslovak Academy of Sciences (1958a).
3. Herbert, D.: VII. Int. Congr. Microbiol. Symp. 381?396, Stockholm (1958b).
4. ?, R. Elsworth, and R. Telling: The continuous culture of bacteria; a theoretical and experimental study. J. gen. Microbiol. 15, 601?622 (1956).
5. Hoelscher, R., J. Arnold, and H. Pierce: Graphic aids in engineering computation, p. 36. New York: McGraw-Hill 1952.