1. Nitrogen Fixation Research: A Key to World Food?
2. Burris, R.H. 1980. The global nitrogen budget—Science or Seance? p. 7–16. In: Nitrogen fixation: free-living systems and chemicals models. W.E. Newton and W.H. Orme-Johnson (eds.), University Park Press, Baltimore.
3. Dinitrogen fixation in forest ecosystems
4. Becking, J.H. 1981. The genus Frankia, p. 1991–2003. In: The prokaryotes: a handbook on habitats, isolation, and identification of bacteria. M.P. Starr, H. Stolp, H.G. Trüper, A. Balows and H.G. Schlegel (eds.), Springer-Verlag, Berlin, Heidelberg, New-York.
5. Cyanobacteria-eukaryotic plant symbioses