● Bowman JP,Sly LI,Nicholas PD,Hayward AC (1993). Revised Taxonomy of the Methanotrophs: Description of Methylobacter gen. nov., Emendation of Methylococcus, Validation of Methylosinus and Methylocystis Species, and a Proposal that the Family Methylococcaceae Includes Only the Group I Methanotrophs. Int. J. Syst. Bacteriol. 43, 735-753.