1. World Health Organisation, Guidelines for Drinking Water Quality, third ed., USA, 2004.
2. World Health Organisation, Water, sanitation and hygiene links to health. Facts and figures, 2004.
3. Waterborne diseases: update on water quality assessment and control;Grabow;Water SA,1996
4. Enhanced disinfection efficiency of mechanically mixed oxidants with free chlorine;Son;Water Res.,2005
5. Ozone and chlorine inactivation of Cryptosporidium;Finch,1994