The AD775 cosmic event revisited: the Sun is to blameI. G. Usoskin, B. Kromer, F. Ludlow, J. Beer, M. Friedrich, G. A. Kovaltsov, S. K. Solanki and L. WackerA&A, 552 (2013) L3DOI: https://doi.org/10.1051/0004-6361/201321080
