Bushnell, P.G. & Lutz, P.L. & Gruber, S.H. (1989)
The metabolic rate of an active, tropical elasmobranch, the lemon shark (Negaprion brevirostris). Experimental Biology, 48(5), 279–283

Bushnell, P.G. & Lutz, P.L. & Steffensen, J.F. & Oikari, A. & Gruber, S.H. (1982)
Increases in arterial blood oxygen during exercise in the lemon shark (Negaprion brevirostris). Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 147(1), 41–47
DOI: 10.1007/BF00689288