Reference

Daan Vanhove, Peter Stassen, Robert Speijer, Etienne Steurbaut (2011): Assessing the use of fish otolith stable O and C isotope geochemistry as a paleotemperature and seasonality proxy: results from the early Eocene climatic optimum (EECO) in Belgium – Berichte der Geologischen Bundesanstalt – 85: 164.