Xing, Y., Peng, H., Zhang, M., Li, X., Zeng, W., & Yang, X. (2012). Caffeic acid product from the highly copper-tolerant plant Elsholtzia splendens post-phytoremediation: Its extraction, purification, and identification. Zhejiang University Press.

Xing, Yan, Hong-yun Peng, Meng-xi Zhang, Xia Li, Wei-wei Zeng, e Xiao-e Yang. Caffeic Acid Product From the Highly Copper-tolerant Plant Elsholtzia Splendens Post-phytoremediation: Its Extraction, Purification, and Identification. Zhejiang University Press, 2012.

Xing, Yan, et al. Caffeic Acid Product From the Highly Copper-tolerant Plant Elsholtzia Splendens Post-phytoremediation: Its Extraction, Purification, and Identification. Zhejiang University Press, 2012.