DRYDEN, Henry; STUART, John. Notice of the Burg of Mousa in Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 3, p. 123–124, 1862. DOI: 10.9750/PSAS.003.123.124. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/4503. Acesso em: 25 apr. 2024.