DEHN, Torben; ILLUM, Svend. Birch bark in Danish passage graves. Journal of Danish Archaeology, [S. l.], v. 14, p. 23–44, 2006. DOI: 10.1080/0108464X.2006.10590109. Disponível em: https://tidsskrift.dk/jda/article/view/127877. Acesso em: 25 dec. 2025.