1. Yates MG: Biochemistry fixation. In: The Biochemistry of plants 5 Amino acids and derivatives Miflin BJ (ed), New York, Academic Press, 1980, p 1–64.
2. Zumft WG, Mortensen LE, Palmer G: Electron-paramagnetic-resonance studies on nitrogenase. Eur J Biochem 46: 525–535, 1974.
3. Burris RH, Orme-Johnson WH: Mechanism of nitrogen fixation. In: 1st International symposium of nitrogen fixation Newton W, Nyman CJ (eds), Pullman, Washington State University Press, 1976, p 208–233.
4. Smith BE, Eady RR, Thorneley RNF, Yates MG, Postgate JR: Some aspects of the mechanism of nitrogenase. In: Recent developments of nitrogen fixation Newton W, Postgate JR, Rodriguez-Barrueco C (eds), New York, Academic Press, 1977, p 191–204.
5. Burris RH: Fixation by free-living microorganisms: Enzymology. In: The chemistry and biochemistry of nitrogen fixation Postgate JR (ed), London, Plenum Press, 1971, p 106–160.