1. Amotz, S., Nielsen, T. K., and Thiesen, N. O. (1976). U.S. Patent 3,980,521.
2. “Biotechnology and Fungal Differentiation”;Aunstrup,1978
3. Aunstrup, K., Outtrup, H., Andresen, O., and Dambmann, C. (1972). Ferment. Technol. Today, Proc. Int. Ferment. Symp., 4th 1972 pp. 299–305.
4. “Handbook of Biotechnology”;Barker,1975
5. “Continuous Culture 6: Applications and New Fields”;Diers,1976