Yang, Zi-Feng, Ping Hu, Shan Zhong, Ye Chen, Li Li, Xu-Zhao Li, Chuyan Li, Jing Li, and Yu-Tao Wang. 2015. “Extraction and Separation of Polysaccharides from Radix Isatidis and Their Effects Towards Hemagglutinin Protein of Influenza Virus”. Asian Journal of Chemistry 27 (5):1615-20. https://doi.org/10.14233/ajchem.2015.17394.