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4. V. A. Burov and Yu. P. Ochelkov, “Predicting Intensity of Solar Proton Events with Proton Energy 10–100 MeV Based on Flare X-rays,” in Proceedings of the Conference “Solar and Solar-terrestrial Physics–2019” (VVM, St. Petersburg, 2019) [in Russian].
5. EPCARD, https://www1.helmholtz-muenchen.de/epcard/online/fluginput.php?lang=de.