Rasmussen, Erik S, Karen Dybkjær, and Stefan Piasecki. “The Billund Delta: A Possible New Giant Aquifer in Central and Western Jutland”. GEUS Bulletin 4 (July 20, 2004): 21–24. Accessed November 22, 2024. https://geusbulletin.org/index.php/geusb/article/view/4773.