Template:Garrity & Holt, 2001b
- Garrity, G.M. & Holt, J.G. 2001. Class VII. Methanopyri class. nov. pp. 353–355. In: Boone, D.R., Castenholz, R.W. & Garrity, G.M. (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 1 (The Archaea and the Deeply Branching and Phototrophic Bacteria). Springer, New York.