T. I. Ditchenko and V. M. Yurin, “Regulation of phenolic secondary metabolites production by Echinacea purpurea L. Moench callus culture of root origin”, Экспериментальная биология и биотехнология, no. 2, pp. 57–64, Jan. 2019, Accessed: Jul. 18, 2026. [Online]. Available: https://journals.bsu.by/index.php/biology/article/view/2509