Excavation of two Orcadian burnt mounds at Liddle and Beaquoy. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 106, p. 39–98, 1977. DOI: 10.9750/PSAS.106.39.98. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8913. Acesso em: 5 dec. 2025.