Reference

Alina I. Iakovleva, Galina N. Aleksandrova, Yu. O. Gavrilov, Olga V. Golovanova, Boris G. Pokrovsky (2011): A new high resolution palynological and geochemical study of the Paleocene-Eocene Thermal Maximum from eastern Peri-Tethys – Berichte der Geologischen Bundesanstalt – 85: 96.