IOANNIS, I. F. Prospecting for voids with vertical radar profiling. Bulletin of the Geological Society of Greece, [S. l.], v. 34, n. 4, p. 1363–1370, 2001. DOI: 10.12681/bgsg.17229. Disponível em: https://ejournals.epublishing.ekt.gr/index.php/geosociety/article/view/17229. Acesso em: 20 dec. 2024.