1. Zadrazil, F., and Grabbe, K. (1983), inBiotechnology, vol. 3 (Delweg, H., ed.), Verlag Chemie, Weinheim, pp. 144–187.
2. Chang, S. T., Lau, O. W., and Cho, K. Y. (1981),Eur. J. Appl. Microbiol. Biotechnol. 12, 58.
3. Humfeld, H. (1950), inYearbook of Agriculture (1950–51). US Dept. of Agriculture, pp. 242–245.
4. Szuecs, J. (1958),US Patent 2,850,841.
5. Falanghe, H. (1962),Appl. Microbiol. 10, 572.