Дорохов, В. Л., Ю. Б. Милованов, and Ю. П. Федоренко. “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, Nov. 2017, pp. 80-84, https://periodicals.karazin.ua/radiophysics/article/view/11426.