Osman, Y. A., W. M. El-Senousy, A. A. El-Morsi, and M. K. Rashed. “Efficiency of Traditional Water Treatment Plant and Compact Units in Removing Viruses”. International Journal of Applied Sciences and Biotechnology, vol. 3, no. 3, Sept. 2015, pp. 528-36, doi:10.3126/ijasbt.v3i3.13332.