BATEY, Coleen E; FREEMAN, Claudine. Lavacroon, Orphir, Orkney. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 116, p. 285–300, 1987. DOI: 10.9750/PSAS.116.285.300. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9272. Acesso em: 6 may. 2024.