G. Heikal, R. Wagdy, and G. Eldidamony, “Bacteriophage Removal Using Upflow Biosand filer: A Laboratory Study”, ASRJETS-Journal, vol. 38, no. 1, pp. 118–125, Nov. 2017, Accessed: Sep. 18, 2025. [Online]. Available: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/3621