Sandrin, Alessandro, Aleksandar Maricak, Björn H. Heincke, Rune J. Clausen, Lars Nielsen, and Jakob K. Keiding. “Geophysics for Urban Mining and the First Surveys in Denmark: Rationale, Field Activity and Preliminary Results”. GEUS Bulletin 44 (July 2, 2020). Accessed May 20, 2022. https://geusbulletin.org/index.php/geusb/article/view/5240.