ELLMANN, Artu; JÜRGENSON, Harli. Evaluation of grace-based combined geopotential model over the Baltic countries. Geodesy and Cartography, [S. l.], v. 34, n. 2, p. 35–44, 2012. DOI: 10.3846/1392-1541.2008.34.35-44. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/10893. Acesso em: 9 may. 2025.