DEPENDENCE OF TOTAL ELECTRON CONTENT OVER KAZAKHSTAN REGION ON SOLAR ACTIVITY. Journal of open systems evolution problems, [S. l.], v. 16, n. 1, p. 42–47, 2021. Disponível em: https://peos.kaznu.kz/index.php/peos/article/view/142. Acesso em: 5 jul. 2026.