Kornievskiy, Y. I., D. Y. Skoryna, V. H. Korniievska, and N. V. Kandybei. “Comparative Chromato-Mass Spectrometric Study of Tinctures Based on Echinacea Purpurea (L.) Moench”. Current Issues in Pharmacy and Medicine: Science and Practice, vol. 14, no. 3, Oct. 2021, pp. 275-81, doi:10.14739/2409-2932.2021.3.242845.