Kejlbo, Ib, and Einar Storgaard. “Vinlandsproblemet - The Vinland Discussion”. Geografisk Tidsskrift - Danish Journal of Geography 64, no. 2 (December 1, 1965): 234–243. Accessed December 5, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/129029.