Perangin-Angin, Elpina Br, Novitaria Br Sembiring, and Vera Estefania Kaban. “Test of Total Flavonoids and Antioxidant Activity of Active Fraction of Robusta Coffee Beans (Coffea Canephora L.) for Diabetic Ulcers”. Journal of Pharmaceutical and Sciences 9, no. 1 (March 1, 2026): 624–634. Accessed March 2, 2026. https://journal-jps.com/new/index.php/jps/article/view/1342.