GOUDIE, Gilbert. Notice of a Sculptured Slab from the Island of Burra, Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 15, p. 199–209, 1881. DOI: 10.9750/PSAS.015.199.209. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5965. Acesso em: 24 apr. 2024.