Paytan, A.; Averyt, K.; Faul, K.; Gray, E.; Thomas, E. (2007): Barite accumulation, ocean productivity, and Sr/Ba in barite across the Paleocene-Eocene Thermal Maximum. Geological Society of America (GSA), Boulder, CO, United States, Geology (Boulder), 35 (12), 1139-1142, georefid:2008-000029