“In Vitro Antioxidant Properties of Lactobacillus Gasseri Isolated from Fermented Milk: Isolation and Preparation of Strains and Intracellular Cell-Free Extracts, Chemical Testing (Hydrogen Peroxide, Superoxide, Hydroxyl Radical, DPPH, Ferrous Ion Chelatin”. 2024. Indonesian Journal of Science and Technology 9 (3): 611-22. https://ijost.upi.edu/index.php/ijost/article/view/421.