HUNTER, J R; DOCKRILL, S J. The island of Muckle Skerry, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 112, p. 518–524, 1983. DOI: 10.9750/PSAS.112.518.524. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9095. Acesso em: 19 apr. 2024.