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Diaz, Henry F.; Trigo, Ricardo; Hughes, Malcom K.; Mann, Michael E.; Xoplaki, Elena; Barriopedro, David (2011). Spatial and temporal characteristics of climate in Medieval times revisted. Bulletin of the American Meteorological Society, 92(11), pp. 1467-1485. Boston, Mass.: American Meteorological Society 10.1175/BAMS-D-10-05003.1
