Ward NL, Challacombe JF, Janssen PH, Henrissat B, Coutinho PM, Wu M, Xie G, Haft DH, Sait M, Badger J et al..  2009.  Three genomes from the phylum Acidobacteria provide insight into the lifestyles of these microorganisms in soils.. Appl Environ Microbiol. 75(7):2046-56.