1. Tempest DW, Neijssel OM, Zevenboom W (1983) In: Slater JH, Whittenbury R, Wimpenny JWT (eds) Microbes in their natural environments. Cambridge University Press, Cambridge, p 119
2. Smith RL, Schank SC, Milam JR, Baltensperger AA (1984) Appl Environ Microbiol 47:1331
3. Okon Y, Hadar Y (1987) CRC Crit Rev Biotechnol 6:61
4. Jutsum AR (1988) Phil Trans R Soc Lond B 318:357
5. Campbell R, Macdonald RM (1989) Microbial inoculation of crop plants. IRL Press, Oxford