ЖИВОЛУП, Т.; ПАНАСЕНКО, С.; КОЛОСКОВ, О.; ЛІСАЧЕНКО, В. . Joint Ionosonde Studies of F2 Layer Critical Frequency Variations in the Ionosphere over Kharkiv and Tromsø during Fall Equinox in Quiet and Disturbed Conditions. PHYSICS OF ATMOSPHERE AND GEOSPACE, [S. l.], v. 2, n. 1, p. 38-49, 2021. DOI: 10.47774/phag.02.01.2021-4. Disponível em: https://phag.org.ua/index.php/phag/article/view/13. Acesso em: 5 dec. 2021.