ULTRA-LOW-FREQUENCY FLUCTUATIONS OF GEOMAGNETIC FIELD AS MEAS- URED AT THE OBSERVATORY ALMA-ATA [43.25N; 76.95E]. Journal of open systems evolution problems, [S. l.], v. 21, n. 1-2, p. 91–98, 2023. Disponível em: https://peos.kaznu.kz/index.php/peos/article/view/262. Acesso em: 5 jul. 2026.