Template:Kokuho et al., 2003
- Kokuho, T., Nakaya, K. & Kitigawa, D. 2003. Distribution and reproductive biology of the Nine-spot Ratfish Hydrolagus barbouri (Holocephali; Chimaeridae). Memoirs of the graduate school of fischeries sciences Hokkaido university 50(2): 63–87. (Japanese) Online