DARGIS, Robertas. Analysis of GPS and GSM hybrid systems for determination of spatial coordinates. Geodesy and Cartography, [S. l.], v. 33, n. 3, p. 69–71, 2012. DOI: 10.3846/13921541.2007.9636721. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/10913. Acesso em: 9 may. 2025.