Gadgil, A., 1997, Field-testing UV Disinfection of Drinking Water, Water Engineering Development Center, University of Loughborough, UK: LBNL 40360.
Truy cập ngày 30 tháng 1 năm 2011.  ^ Gadgil, A., 1997, Field-testing UV Disinfection of Drinking Water, Water Engineering Development Center, University of Loughborough, UK: LBNL 40360. ^ Nardell, Edward (January–February 2008).