1. L. Carreira and L. G. Ljungdahl, in “Liquid Fuel Developments. CRC Series in Bioenergy Systems,” ed. by D. L. Wise, CRC Press, Inc., Boca Raton, Fla., 1983, pp. 1–29.
2. R. E. Hungate, in “Methods in Microbiology,” Vol. 3B, ed. by J. R. Norris and D. We. Ribbon, Academic Press, London, 1969, pp. 117–132.
3. “Anaerobe Laboratory Manual,” 4th Ed., ed. by L. V. Holdeman, E. P. Cato, and W. E. C. Moore, Anaerobe Laboratory, Virginia Polytechnic Institute and State University, Blacksburg, 1977.
4. E. P. Cato, W. L. George, and S. M. Finegold, in “Bergey’s Manual of Systematic Bacteriology,” Vol. 2, ed. by P. H. A. Sneath, N. S. Mair, M. E. Sharp, and J. G. Hobb, The Williams & Wilkins, Baltimore, 1986, pp. 1140–1200.