1. Centers for Disease Control and Prevention (CDC), “The Safe Water System.” 2014.
2. World Health Organization (WHO), “Guidelines for drinking-water quality.,” WHO chronicle, vol. 38, no. 3. Jan-2008.
3. World Health Organization (WHO), “Emerging Issues in Water and Infectious Disease,” 2003.
4. C. Yanmin, “Visible-light-driven Photocatalytic Disinfection of Bacteria by the Natural Sphalerite,” The Chinese University of Hong Kong, 2011.
5. N. M. Budari, M. F. Ali, K. H. K. Hamid, and M. Musa, “Ultrasonic Irradiation on Microorganism Disruption in Water Disinfection Process – A Mini Overview,” Appl. Mech. Mater., vol. 754–755, pp. 676–681, 2015.