1. Abouzied, M.M. and Reddy, C.A. 1986. Appl. Environ. Microbiol. 52: 1055–1059.
2. Abouzied, M.M. and Reddy, C.A. 1987. Biotechnol. Lett. 9: 59–62.
3. Afanaseva, V.P. and Burd, G.I. 1980. Mikrobiologiya 49: 433–439.
4. Akaki, M.,Kawamura, R. and Yamada, T. 1984. J. Agric. Chem. Soc. (Japan). 58: 153–159.
5. Alexander, W.M., Strasser, R., Jurgen, D., Seeboth, P.G. and Cornelis, P.H. 1988. 8th International Biotechnology Symposium Paris, pp. 17–22.