Поспєлов СВ. Peculiarities of development of inflorescences and flowering of purple coneflower (Echinacea purpurea (L.) Moench) and pale coneflower (Echinacea pallida (Nutt.) Nutt.) in the foreststeppe of Ukraine. Scient.Prog.&Innov. [Internet]. 2012 Sep. 27 [cited 2025 Aug. 23];(3):35-43. Available from: https://journals.pdau.edu.ua/visnyk/article/view/630