1. Burris RH (1974) Methodology. In: Quispel A (ed) The Biology of Nitrogen Fixation. North-Holland Publishing Company, Amsterdam, p 9
2. Habte M (1983) Apparatus for the nitrogenase (C2H2 - C2H4) assay of intact whole plantsoil systems. Soil Biol Biochem 15:719–720
3. Hardy RW, Burns RC, Holsten RD (1973) Application of acetylene-ethylene assay for measurement of nitrogen fixation. Soil Biol Biochem 5:47–81
4. Hardy RWF, Holsten RD (1977) Methods for measurement of dinitrogen fixation. In: Hardy RWI, Gibson AH (eds) A Treatise on Dinitrogen Fixation. Section IV: Agronomy and Ecology. John Wiley & Sons, New York, p 451
5. Masterson CL, Murphy PM (1980) The acetylene reduction technique. In: Subba Rao NS (ed) Recent Advances in Biological Nitrogen Fixation. Edward Arnold Publ, London, p 8