^Fujikura, Katsunori; Okutani, Takashi; Maruyama, Tadashi. Sensui chōsasen ga mita shinkai seibutsu : shinkai seibutsu kenkyū no genzai (Deep-sea life: biological observations using research submersibles). Tokai University Press. 2008. ISBN 978-4-486-01787-5. p. 20.