1. Hoppe-Seyler, F.: Hoppe-Seyler's Z. Physiol. Chem. 10 (1886) S. 201/217.
2. Hungate, R. E.: Bacteriol. Rev. 14 (1950) S. 1/49.
3. Wolfe, R. S.: Adv. Microb. Physiol. 6 (1971) S. 107/146.
4. Ehhalt, D. H., in: Microbial production and utilization of gases, S. 13/22, Verlag E. Goltze, Göttingen 1976.
5. Hobson, P. N.; Bousfield, S.; Summers, R.: Crit, Rev. Environ. Control. 4 (1974) S. 131/191.