I. R. Fathar, E. Riani, N. Nurhasanah, and A. Munawir, “Utilization of Ozone and Kefir Whey Probiotics as a Green Technology in Coliform Removal in Health Care Facilities Wastewater”, Astonjadro, vol. 12, no. 3, pp. 799–813, Oct. 2023.