1.
A. Nasser R, A. Hadi K. Study the Impact of the Distance Factor on the Optimal Workable Frequencies for the Long Distance Radio Communications. Iraqi Journal of Science. 2023;56(3B):2392-2400. Accessed July 2, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9876