Solar proton events in cosmogenic isotope data

Usoskin IG, Solanki SK, Kovaltsov GA, Beer J & Kromer B
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Usoskin, I. G., Solanki, S. K., Kovaltsov, G. A., Beer, J., & Kromer, B. (2006). Solar proton events in cosmogenic isotope data. Geophysical Research Letters, 33(8), 1-4. https://doi.org/10.1029/2006GL026059