Pavlenko-Badnaoui, M.; Protska, V.; Burda, N.; Zhuravel, I.; Kuznetsova, V. The Study of Phenolic Compounds and Antioxidant Activity of Raw Materials of Heliopsis Helianthoides (l.) Sweet. Curr. Issues Pharm. Med. Sci. 2021, 34 (1), 28-33. https://doi.org/10.2478/cipms-2021-0006.