1. Anderson, A. J., and D. Spencer: Sulphur in nitrogen metabolism of legumes and non-legumes. Austral. J. Sci. Res. B 3, 431–449 (1950).
2. Arnon, D. I.: Extracellular photosynthetic reactions. Nature (Lond.) 167, 1008–1010 (1951).
3. Aubel, E., B. Lubochinsky and A. Prouvost: Au sujet de la reduction des nitrates en nitrites par E. coli. C. r. Acad. Sci. Paris 236, 145–147 (1953).
4. Back, K. J. C., J. Lascelles and J. L. Still: Hydrogenase. Austral. J. Sci. 9, 25 (1946).
5. Bernheim, F.: Aldehyde oxidase of potato. Biochemie. J. 22, 334–352 (1928).