John, J. & Seidemann, D.E. & Chamberlain, J.A. & Cheng, Z. & Becker, M.A. (2012)
Trace and Minor Element Chemistry of Modern Shark Teeth and Implications for Shark Tooth Geochronometry. In Wai, M., and Gong, X.G. (Eds), Strontium: Chemical Properties, Applications, and Health Effects, Nova Science Publishers, ISBN: 978–1–62257–631–9: 27–53
Becker, M.A. & Seidemann, D.E. & Chamberlain, J.A. & Buhl, D. & Slattery, W. (2008)
Strontium isotopic signatures in the enameloid and dentine of upper Cretaceous shark teeth from western Alabama: paleoecologic and geochronologic implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 264(1–2), 188–194
DOI: 10.1016/j.palaeo.2008.04.006