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Büntgen, Ulf; Tegel, Willy; Carrer, Marco; Krusic, Paul J.; Hayes, Michael; Esper, Jan (2015). Commentary to Wetter et al. (2014): Limited tree-ring evidence for a 1540 European ‘Megadrought’. Climatic change, 131(2), pp. 183-190. Springer 10.1007/s10584-015-1423-1
