Мальцева, Елена Михайловна, et al. “ANTIOXIDANT AND ANTIRADICAL ACTIVITY IN VITRO OF HERB EXTRACTS OF SANGUISORBA OFFICINALIS L., GATHERED IN VARIOUS DEVELOPMENT STAGES”. Medicine in Kuzbass, vol. 16, no. 2, June 2017, pp. 32-38, https://www.mednauki.ru/index.php/MK/article/view/88.