LIVERSAGE, D. An Uncompleted Fortification on Sejerø. Journal of Danish Archaeology, [S. l.], v. 1, p. 87–94, 1982. DOI: 10.1080/0108464X.1982.10589878. Disponível em: https://tidsskrift.dk/jda/article/view/125744. Acesso em: 17 jun. 2024.