Yano, K. & Stevens, J.D. & Compagno, L.J.V. (2004)
A review of the systematics of the sleeper shark genus Somniosus with redescriptions of Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae). Ichthyological Research, 51(4), 360–373
DOI: 10.1007/s10228-004-0244-4

Compagno, L.J.V. (2005)
Checklist of living Chondrichthyes. In W.C. Hamlett (Ed.), Reproductive biology and phylogeny of chondrichthyes: sharks, rays and chimaeras, Vol. 3 (pp. 503–548). Science Publishers, Endfield, USA

Shinohara, G. & Sato, T. & Aonuma, Y. & Horikawa, H. & Matsuura, K. & Nakabo, T. & Sato, K. (2005)
Annotated checklist of deep-sea fishes from the waters around the Ryukyu Islands, Japan. Deep-sea fauna and pollutants in the Nansei Islands. Monographs of the National Science Museum Tokyo, 29, 385–452

Nakabo, T. (2013)
Fishes of Japan with Pictorial Keys to the Species. Third Edition. Tokyo: Tokai University Press. 2428 pp.