Consistency of the average flux of solar energetic particles over timescales of years to megayearsI. G. Usoskin, S. A. Koldobskiy, S. V. Poluianov, O. Raukunen, R. Vainio and G. A. KovaltsovA&A, 670 (2023) L22DOI: https://doi.org/10.1051/0004-6361/202245810
