First evidence for the Cenomanian-Turonian oceanic anoxic event (OAE2, 'Bonarelli' event) from the Ionian Zone, western continental Greece - Karakitsios, V; Tsikos, H; van Breugel, Y; Koletti, L; Damste, J; Jenkyns, H (INTERNATIONAL JOURNAL OF EARTH SCIENCES, 2007)