1. Avgerinos, G.C., Fang, H.Y., Biocic, I. and Wang, D.I.C. (1981). Advances in Biotechnology. Vol. 2. p. 119. Pergamon Press.
2. Humphry, A. (1979). Adv. Chem. Ser. 181, 25?28.
3. Khan, A.W. (1977). Can. J. Microbiol. 23, 1700?1705.
4. Khan, A.W. (1981). J. Gen. Microbiol. 121, 499?502.
5. Khan, A.W. and Murray, W.D. (1982). FEMS Microbiol. Letters. In press.