Article ISI
Nature communications  (2018)

Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE

Büntgen, U.; Wacker, L.; Galván, J.D.; Arnold, S.; Arseneault, D.; Baillie, M.; Beer, J.; Bernabei, M.; Bleicher, N.; Boswijk, G.; Bräuning, A.; Carrer, M.; Charpentier Ljungqvist, F.; Cherubini, P.; Christl, M.; Christie, D.A. et al.; Clark, P.W.; Cook,