SKEIVALAS, Jonas. Accuracy of geodetic coordinates using Helmert transformation algorithm. Geodesy and Cartography, [S. l.], v. 30, n. 4, p. 97–100, 2012. DOI: 10.3846/13921541.2004.9636650. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/10986. Acesso em: 13 may. 2025.