Tiedemann, R.; Steph, S.; Sturm, A.; Groeneveld, J. (2005): Permanent El Nino-like climate state during the warm Pliocene; evidence from changes in East Pacific equatorial upwelling. American Geophysical Union, Washington, DC, United States, In: Anonymous, AGU 2005 fall meeting, 86 (52, Suppl.), georefid:2009-050363