Estrada, J.A. & Rice, A.N. & Lutcavage, M.E. & Skomall, G.B. (2003)
Predicting trophic position in sharks of the north-west Atlantic Ocean using stable isotope analysis.
Journal of the Marine Biological Association of the United Kingdom, 83(6), 1347–1350 DOI: 10.1017/s0025315403008798