Template:Kadota, 2004
- Kadota, Y. 2004. Taxonomic Studies of Cirsium (Asteraceae) in Japan XII. Subsect. Nipponensia, Subsect. Nov. and a New Species, C. hachimantaiense, Belonging to the New Subsection. Bulletin of the National Science Museum, Tokyo. Series B, Botany 30(3): 117–133. PDF