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Breitenmoser, Petra; Beer, Jürg; Brönnimann, Stefan; Frank, David; Steinhilber, Friedhelm; Wanner, Heinz (2012). Solar and volcanic fingerprints in tree-ring chronologies over the past 2000 years. Palaeogeography, Palaeoclimatology, Palaeoecology, 313-314, pp. 127-139. Amsterdam: Elsevier 10.1016/j.palaeo.2011.10.014
