Tomita, T. & Murakumo, K. & Miyamoto, K. & Sato, K. & Oka, S.I. & Kamisako, H. & Toda, M. (2016)
Eye retraction in the giant guitarfish, Rhynchobatus djiddensis (Elasmobranchii: Batoidea): a novel mechanism for eye protection in batoid fishes.
Zoology, 119(1), 30–35 DOI: 10.1016/j.zool.2015.09.004