SKEIVALAS, Jonas. Practice of correlation analysis for determination of ionospheric influence on GPS measurements. Geodesy and Cartography, [S. l.], v. 33, n. 4, p. 98–101, 2012. DOI: 10.3846/13921541.2007.9636727. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/10907. Acesso em: 9 may. 2025.