“BIOLOGICALLY ACTIVE SUBSTANCES OF THE MEDICINAL PLANT ECHINACEA PURPUREA (L.) MOENCH”, Amer. Jour. of Inte. Rese. and Deve., vol. 11, pp. 225–230, Dec. 2022, Accessed: Jan. 31, 2026. [Online]. Available: https://ajird.journalspark.org/index.php/ajird/article/view/430