ZNOTINA, Madara; LIEPINS, Ivars; KOSENKO, Ksenija. Development of Latvian national 2nd order leveling network. Geodesy and Cartography, [S. l.], v. 42, n. 4, p. 136–139, 2016. DOI: 10.3846/20296991.2016.1226395. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/2411. Acesso em: 9 may. 2025.