[1]
S. A. Thabit, L. E. George, and K. A. Hadi, “Seasonal Variations of the Optimum Reliable Frequencies During Maximum and Minimum Periods of Solar Cycle 24”, Al-Mustansiriyah Journal of Science, vol. 31, no. 4, pp. 15–27, Dec. 2020, doi: 10.23851/mjs.v31i4.887.