Ma, Chao-Mei, Xiu-Hong Wu, Masao Hattori, Xi-Jun Wang, and Yoshihiro Kano. 2009. “HCV Protease Inhibitory, Cytotoxic and Apoptosis-Inducing Effects of Oleanolic Acid Derivatives”. Journal of Pharmacy & Pharmaceutical Sciences 12 (3):243-48. https://doi.org/10.18433/J3DW2D.