Allawi, H. H. “Relationship of Soft X–Ray Caused from Solar Flares and Solar Energetic Particles at Maximum of Solar Cycle 24”. University of Thi-Qar Journal of Science, Vol. 4, no. 3, July 2019, pp. 175-8, https://www.jsci.utq.edu.iq/index.php/main/article/view/650.