VÁCZYOVÁ, Magdaléna; VALACH, Fridrich. The effect of the geomagnetic activity on the geomagnetic measurement’s accuracy. Contributions to Geophysics and Geodesy, [S. l.], v. 36, n. 2, p. 229–237, 2021. Disponível em: https://journals.savba.sk/index.php/cgg/article/view/5010. Acesso em: 4 feb. 2026.