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von Paris, Philip and Rauer, Heike and Grenfell, J Lee and Patzer, B and Hedelt, Pascal and Stracke, Barbara and Trautmann, Thomas and Schreier, Franz (2008) Warming the early Earth - CO2 reconsidered. Planetary and Space Science, 56 (9), pp. 1244-1259. Elsevier. DOI: 10.1016/j.pss.2008.04.008. ISSN 0032-0633.