Zachos, James C.; McCarren, Heather; Murphy, Brandon; Rohl, Ursula; Westerhold, Thomas (2010): Tempo and scale of late Paleocene and early Eocene carbon isotope cycles; implications for the origin of hyperthermals. Elsevier, Amsterdam, Netherlands, Earth and Planetary Science Letters, 299 (1-2), 242-249, georefid:2011-034349