EL-ASHMAWY, Khalid L. A. Accuracy, time cost and terrain independence comparisons of levelling techniques. Geodesy and Cartography, [S. l.], v. 40, n. 3, p. 133–141, 2014. DOI: 10.3846/20296991.2014.962727. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/3219. Acesso em: 12 may. 2025.