@article {18872,
	title = {Abundance of ammonia-oxidizing bacteria and archaea in industrial and domestic wastewater treatment systems},
	journal = {FEMS Microbiology Ecology},
	volume = {80},
	year = {2012},
	pages = {323-330},
	url = {10.1111/j.1574-6941.2012.01296.x},
	author = {Bai, Yaohui and Sun, Qinghua and Wen, Donghui and Xiaoyan Tang}
}
