J. VAN DER KRUK; E.C. SLOB; J.T. FOKKEMA. Background of ground-penetrating radar measurements. Netherlands Journal of Geosciences, [S. l.], v. 77, p. 177–188, 1999. Disponível em: https://njgjournal.nl/index.php/njg/article/view/12210. Acesso em: 13 nov. 2026.