Vu, Thi-Mai-Hoa, Thi-Van Hoang, Thi-Quynh-Huong Nguyen, Pham-Minh-Khue Doan, Thi-Thuy-Duong Nguyen, Thi-Thu-Thuy Bui, Chi-Cong Nguyen, Hong-Duyen Tran, Thi-Phuong-Thao Pham, and Hai-Anh Ha. “Echinacea Purpurea: An Overview of Mechanism, Efficacy, and Safety in Pediatric Upper Respiratory Infections and Otitis Media”. International Journal of Plant Based Pharmaceuticals 4, no. 2 (June 16, 2024): 90–100. Accessed July 2, 2024. https://ijpbp.com/index.php/ijpbp/article/view/213.