YENNY, Y.; DJANUN, Z. The benefits and risks of Echinacea in treatment of common cold and influenza. Universa Medicina, [S. l.], v. 27, n. 3, p. 132–142, 2008. DOI: 10.18051/UnivMed.2008.v27.132-142. Disponível em: https://univmed.org/ejurnal/index.php/medicina/article/view/282. Acesso em: 2 may. 2024.