^ abCampbell MA, Chain PS, Dang H, El Sheikh AF, Norton JM, Ward NL, Ward BB, Klotz MG (2011). "Nitrosococcus watsonii sp. nov., a new species of marine obligate ammonia-oxidizing bacteria that is not omnipresent in the world's oceans: Calls to validate the names 'Nitrosococcus halophilus' and 'Nitrosomonas mobilis'.". FEMS Microbiol Ecol. 76 (1): 39–48. doi:10.1111/j.1574-6941.2010.01027.x. PMID21204874.