BOZZANO, A. & MURGIA, R. & VALLERGA, S. & HIRANO, J. & ARCHER, S. (2001)
The photoreceptor system in the retinae of two dogfishes, Scyliorhinus canicula and Galeus melastomus: possible relationship with depth distribution and predatory lifestyle. Journal of Fish Biology, 59 (5): 1258–1278
DOI: 10.1111/j.1095-8649.2001.tb00190.x