Hueter, R.E. & Murphy, C.J. & Howland, M. & Sivak, J.G. & Paul-Murphy, J.R. & Howland, H.C. (2001)
Refractive state and accommodation in the eyes of free-swimming versus restrained juvenile lemon sharks (Negaprion brevirostris). Vision Research, 41(15), 1885–1889
DOI: 10.1016/S0042-6989(01)00064-5