T. M. Auschill and N. Hein, “Effect of Two Antimicrobial Agents on early in Situ Biofilm Formation,” Journal of Clinical Periodontology, Vol. 32, No. 2, February 2005, pp. 147-152. doi:10.1111/j.1600-051X.2005.00650.x
 L. Wang, G. B. Zhou, P. Liu, J. H. Song, Y. Liang, X. J. Uan, F. Xu, B. S. Wang, J. H. Mao, Z. X. Shen, S. J. Chen and Z. Chen, “Dissection of Mechanisms of Chinese Medicinal Formula Realgar-Indigo Naturalis as an Effective Treatment for Promyelocytic Leukemic,” Proceedings of the National Academy of Sciences, Vol. 105, No. 12, March 2008, pp. 4826-4831. doi:10.1073/pnas.0712365105
 J. P. Hu, N. Takahashi and T. Yamada, “Coptidis Rhizoma Inhibits Growth and Proteases of Oral Bacteria,” Oral Disease, Vol. 6, No. 5, September 2000, pp. 297-302. doi:10.1111/j.1601-0825.2000.tb00142.x
 H. H. Yu, K. J. Kim, J. D. Cha, H. K. Kim, Y. E. Lee, N. Y. Choi and Y. O. You, “Antimicrobial Activity of Berberine Alone and in Combination with Ampicillin or Oxacillin against Methicillin-Resistant Staphylococcus Aureus,” Journal of Medical Food, Vol. 8, No. 4, December 2005, pp. 454-461. doi:10.1089/jmf.2005.8.454
 S. Higaki, M. Nakamura, M. Morohashi, Y. Hasegawa and T. Yamagishi, “Anti-Lipase Activity of Kampo Formulations, Coptidis Rhizoma and Its Alkaloids against Propionibacterium Acnes,” Journal of Dermatology, Vol. 23, No. 5, 1996, pp. 310-314.
 R. W. K. Wong, U. Hagg, L Samaranayake, M. K. Z. Yuen, C. J. Seneviratne and R. Kao, “Antimicrobial Activity of Chinese Medicine Herbs against Common Bacteria in Oral Biofilm: A Pilot Study,” International Journal of Oral and Maxillofacial Surgery, Vol. 39, No. 6, 2010, pp. 599-605. doi:10.1016/j.ijom.2010.02.024