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Brehm, Nicolas; Christl, Marcus; Knowles, Timothy D J; Casanova, Emmanuelle; Evershed, Richard P; Adolphi, Florian; Muscheler, Raimund; Synal, Hans-Arno; Mekhaldi, Florian; Paleari, Chiara I; Leuschner, Hanns-Hubert; Bayliss, Alex; Nicolussi, Kurt; Pichler, Thomas; Schlüchter, Christian; Pearson, Charlotte L; Salzer, Matthew W; Fonti, Patrick; Nievergelt, Daniel; Hantemirov, Rashit; ... (2022). Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE. Nature Communications, 13(1), p. 1196. Springer Nature 10.1038/s41467-022-28804-9
Sukhodolov, Timofei; Usoskin, Ilya; Rozanov, Eugene; Asvestari, Eleanna; Ball, William T.; Curran, Mark A. J.; Fischer, Hubertus; Kovaltsov, Gennady; Miyake, Fusa; Peter, Thomas; Plummer, Christopher; Schmutz, Werner; Severi, Mirko; Traversi, Rita (2017). Atmospheric impacts of the strongest known solar particle storm of 775 AD. Scientific Reports, 7(45257), p. 45257. Nature Publishing Group 10.1038/srep45257
Vaino, Rami; Desorgher, Laurent; Heynderickx, Daniel; Storini, Marisa; Flückiger, Erwin O.; Horne, Richard B.; Kovaltsov, Gennady A.; Kudela, Karel; Laurenza, Monica; McKenna-Lawlor, Susan; Rothkaehl, Hanna; Usoskin, Ilya (2009). Dynamics of the Earth's particle radiation environment. Space science reviews, 147(3-4), pp. 187-231. Dordrecht: Kluwer Academic Publishers 10.1007/s11214-009-9496-7
