ПОСПЄЛОВ, С. В. 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. Scientific Progress & Innovations, [S. l.], n. 3, p. 35–43, 2012. DOI: 10.31210/visnyk2012.03.07. Disponível em: https://journals.pdau.edu.ua/visnyk/article/view/630. Acesso em: 23 aug. 2025.