GORDIYENKO, G.; YAKOVETS, A.; YAKOVETS, A.; LITVINOV, Y. LONG - TERM VARIATIONS IN THE F- AND D-REGIONS OF IONOSPHERE. Известия НАН РК. Серия физико-математическая, [S. l.], n. 3, p. 209–216, 2020. Disponível em: https://journals.nauka-nanrk.kz/physics-mathematics/article/view/491. Acesso em: 6 май. 2024.