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Goosse, Hugues; Arzel, O.; Luterbacher, Jürg; Mann, Michael; Renssen, H.; Riedwyl, Nadja; Timmermann, A.; Xoplaki, Elena; Wanner, Heinz (2006). The origin of the European Medieval Warm Period". Climate of the past, 2(2), pp. 99-113. Göttingen: Copernicus Publications 10.5194/cp-2-99-2006
