1. An, H., & Xu, Y. (2000). Application of cellulase in extractional technique of psoraleae. Chinese Traditional and Herbal Drugs, 31, 517.
2. An, Y. Q., Jia, X. B., & Yuan, H. J. (2008). Thinking in studies on antiviral material base of radix isatidis. Chinese Traditional and Herbal Drugs, 39, 616–619.
3. Barbara, H., & Sanford, J. F. (1971). Further studies on the effect of neuraminidase on tumor cell transplantability. Tissue Antigens, 1, 153–161.
4. Cai, B. C., & Luo, X. H. (2006). New technology and application of Chinese materia medica preparation (pp. 65–65). Beijing: People's Medical Press.
5. Carmen, W. (2002). A review of modern sample-preparation techniques for the extraction and analysis of medicinal plants. Analytical and Bioanalytical Chemistry, 373, 23–30.