Abels, Hemmo A.; Clyde, William C.; Gingerich, Philip D.; Hilgen, Frederik J.; Fricke, Henry C.; Bowen, Gabriel J.; Lourens, Lucas J. (2012): Terrestrial carbon isotope excursions and biotic change during Palaeogene hyperthermals. Nature Publishing Group, London, United Kingdom, Nature Geoscience, 5 (5), 326-329, georefid:2012-065489