1. Interventions to improve water quality for preventing diarrhoea;Clasen;Cochrane Database Systematic Reviews,2006
2. Hand washing for preventing diarrhoea;Ejemot;Cochrane Database Systematic Reviews,2008
3. Handbook of Water and Wastewater Microbiology,2003
4. Global challenges in water, sanitation and health;Moe;Journal of Water and Health,2006