Vergun, Olena, Jan Brindza, and Djamal Rakhmetov. “Total Antioxidant Activity of Plants of Symphytum L. Species”. Agrobiodiversity for Improving Nutrition, Health and Life Quality, no. 1 (October 8, 2020). Accessed April 20, 2024. https://agrobiodiversity.uniag.sk/scientificpapers/article/view/126.