“Parameters of the Traveling Ionospheric Disturbances Obtained by Using a Digital Ionosonde”. Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 27 (November 10, 2017): 80–84. Accessed October 24, 2026. https://periodicals.karazin.ua/radiophysics/article/view/11426.