C. P. Perdana, M. Arifuddin, and Y. Sastyarina, “Pengaruh Waktu Fermentasi Bakteri Asam Laktat Dari Sari Kulit Buah Naga Merah (Hylocereus Polyrhizus) Terhadap Aktivitas Bakteri Propionibacterium acne: Effect of Lactic Acid Bacteria Fermentation Time from Red Dragon Fruit Peel Juice (Hylocereus Polyrhizus) on the Activity of Propionibacterium acne”, Proc. Mul. Pharm. Conf., vol. 14, no. 1, pp. 242–248, Dec. 2021.