Tao, Q. F., Xu, Y., Lam, R. Y. Y., Schneider, B., Dou, H., Leung, P. S., Shi, S. Y., Zhou, C. X., Yang, L. X., Zhang, R. P., Xiao, Y. C., Wu, X., Stöckigt, J., Zeng, S., Cheng, C. H. K., & Zhao, Y. (2008). Diarylheptanoids and a monoterpenoid from the rhizomes of Zingiber officinale: antioxidant and cytoprotective properties. Journal of Natural Products, 71(1), 12-17. doi:10.1021/np070114p.