1. Al-Obaidi, Z. and Berry, D.R. (1979).Biotechnology Letters, In Press.
2. Berry, D.R., Cmiel, A. and Al-Obaidi, Z. (1977). In ?Genetics and Physiology of Aspergillus? J.E. Smith and J.A. Pateman, Ed. pp 403?426. London: Academic Press.
3. Perlman, D., Lardy, H.A. and Johnson, M.J. (1944). Ind. Eng. Chem. Analytical Ed. 16, 515?516.
4. Pirt, S.J. (1975).Principles of microbe and cell cultivation: Oxford, Blackwell Scientific Publications.
5. Shu, P. and Johnson, M.J. (1947).J. Bacteriol. 54, 161?167