Ajrina A. PRELIMINARY STUDY OF ANTIOXIDANT ACTIVITY OF DRAGONFRUIT, DATES AND KEFIR MIXTURES. J Vocat Heal Stud [Internet]. 2022 Mar. 28 [cited 2024 Aug. 5];5(3):133-8. Available from: https://e-journal.unair.ac.id/JVHS/article/view/24401