KELLER, H. W. . Echinacea: Herbal Medicine with a Wild History. Journal of the Botanical Research Institute of Texas, [S. l.], v. 11, n. 2, p. 408, 412, 418, 2017. DOI: 10.17348/jbrit.v11.i2.1102. Disponível em: https://journals.brit.org/jbrit/article/view/1102. Acesso em: 25 apr. 2024.