A. A. Putri, R. S. Muhammad, and E. F. Karamah, “Bacterial Disinfection Using Ozone Gas to Extent Spinach’s Shelf Life: The Effect of Dosage, Duration, and Spraying Frequency”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 12, no. 3, pp. 1037–1046, Jun. 2022.