EL-ASHMAWY, Khalid L. A. Photogrammetric block adjustment without control points. Geodesy and Cartography, [S. l.], v. 44, n. 1, p. 6–13, 2018. DOI: 10.3846/gac.2018.880. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/880. Acesso em: 9 may. 2025.