Conrad, R. Emeriti Methanogenic Degradation and Microbial Metabolism of Trace Gases, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;
Conrad, R. (2007). Soil microbial communities and global climate change – methanotrophic and methanogenic communities as paradigms. In Modern Soil Microbiology, 2nd Edition (pp. 263-282). New York: CRC Press.