Archaeological excavations at Castle Sween, Knapdale, Argyll & Bute, 1989-90. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 126, p. 517–557, 1997. DOI: 10.9750/PSAS.126.517.557. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9944. Acesso em: 5 dec. 2025.