Reference
Andre Bornemann, Claudius M. Pirkenseer, Etienne Steurbaut, Robert Speijer (2012): Early Paleogene x13C and x18O records based on marine
ostracodes: implications for the upper Danian succession
at Sidi Nasseur (Tunisia) and their application value
in paleoceanography. – Austrian Journal of Earth Sciences – 105_1: 77 - 87.