Reference

Andre Bornemann, Simon D Haenens, Jeroen Groeneveld, Ursula Röhl, Robert Speijer, Ken Farley, Johnnie A. Lyman, Richard D. Norris (2011): A complex history of the Paleocene-Eocene Thermal Maximum in the NE Atlantic – Berichte der Geologischen Bundesanstalt – 85: 44.