Volker Mosbrugger, Torsten Utescher, and David L. Dilcher: Cenozoic continental climatic evolution of Central EuropeProceedings of the National Academy of Sciences of the United States of America. 2005 October 10.. Arkistoitu 1.8.2013. Viitattu 17.7.2008. (englanniksi)
Volker Mosbrugger, Torsten Utescher, and David L. Dilcher: Cenozoic continental climatic evolution of Central EuropeProceedings of the National Academy of Sciences of the United States of America. 2005 October 10.. Arkistoitu 1.8.2013. Viitattu 17.7.2008. (englanniksi)