[22]Friedrich, R, Kromer, B, Wacker, L, Olsen, J, Remmele, S, Lindauer, S, Land, A, Pearson, C. A new annual 14C dataset for calibrating the Thera eruption. Radiocarbon this issue
[23]Sookdeo A, Kromer B, BŁentgen U, Friedrich M, Friedrich R, Helle G, Pauly M, Nievergelt D, Reinig F, Treydte K, Synal HA, Wacker, L 2019a. Quality Dating: A well-defined protocol implemented at ETH for high-precision 14C dates tested on Late Glacial wood. Radiocarbon.
[24]Friedrich, R, Kromer, B, Sirocko, F, Esper, J, Lindauer, S, Nievergelt, D, Heussner, K, Westphal, T. Annual 14C tree-ring data around 400AD: mid and high-latitude records. Radiocarbon: in press
[25]Usoskin, I. G., B. Kromer, F. Ludlow, J. Beer, M. Friedrich, G. A. Kovaltsov, S. K. Solanki and L. Wacker (2013). 'The AD775 cosmic event revisited: the Sun is to blame.' Astronomy & Astrophysics 552(L3): 1-4.