1. Evans, M.C.W., Buchanan, B.B., Aron, D.I. (1960) Proc. Natl. Acad. Sci. USA 55: 241–244.
2. Shiba, H., Kawasumi, T., Igarashi, Y., Kodama, T., Minoda, Y. (1985) Arch. Microbiol. 141: 198–203.
3. Fuchs, G. (1986) FEMS Microbiol. Reviews 39: 181–213.
4. Bassham, J.A. (1979) In: Encycl. Plant Physiol. New Ser. 6: 9–30.
5. Codd, G.A. (1984) In: Aspects of Microbial Metabolism and Ecology, ed. G.A. Codd, London, Academic Press, 129–173.