1. Zhao ZZ, Guo P, Brand E. The formation of daodi medicinal materials. J Ethnopharmacol. 2012;140(3):476–81.
2. Xiao XH, Chen SL, Huang LQ, Xiao PG. Survey of investigation on daodi Chinese medicinal materials in China sinces 1980s. China J Chin Mater Med. 2009;34(5):519–23.
3. Fan Y. Hou Han Shu (後漢書). Beijing: Zhonghua Book Company; 1965.
4. Cao H, Liao G. “One Belt, One Road” Chinese Medicine Cultural Relics Collection (“壹帶壹路”中醫藥文物圖譜集). Guangzhou: Jinan University Press; 2016.
5. Gao XM. Lectures on Chinese pharmacology-genuine and high-quality drugs. J Tradit Chin Med. 1994;14(2):147–51.