hat
PMID 3878742. ↑ « Treating water with chlorine at point-of-use to improve water quality and reduce child diarrhea in developing countries: a systematic review and meta-analysis ».
eng
PMID 3878742. ↑ Arnold BF, Colford JM (February 2007). "Treating water with chlorine at point-of-use to improve water quality and reduce child diarrhea in developing countries: a systematic review and meta-analysis".