Sulas, Federica, and Søren M Kristiansen. Soil Micromorphology at the Viking-Age Ring-Fortress of Borgring, Denmark: Analysis of Samples from the East, North and South Gateways. Rapporter. Aarhus, DK: Aarhus Universitet, 2020. Accessed February 18, 2026. https://openbooks.kb.dk/au/catalog/book/386.