Jessen, Catherine, Peter Steen Henriksen, Mette Marie Hald, and Jens Ulriksen. “The Lost Landscape of Borgring: Geoarchaeological Investigations into the Navigation To, and Location Of, the Danish Viking Age Ring Fortress”. Danish Journal of Archaeology 10 (July 22, 2021): 1–14. Accessed May 9, 2024. https://tidsskrift.dk/dja/article/view/121917.