Solar activity over nine millennia: A consistent multi-proxy reconstructionC. J. Wu, I. G. Usoskin, N. Krivova, G. A. Kovaltsov, M. Baroni, E. Bard and S. K. SolankiA&A, 615 (2018) A93DOI: https://doi.org/10.1051/0004-6361/201731892