S. Ali, T. Kassa, G. Behailu, and Y. Asfaw, “The Study of TEC Variations on Some Special Days (Solstices, Equinoxes and Days When the Sun is Overhead) at Bahir Dar-Station”, Abyss. J. Sci. Technol., vol. 9, no. 1, pp. 30–39, Jun. 2024.