TRAIL, John. Notes on the Further Excavations of Howmae, 1889. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 24, p. 451–461, 1890. DOI: 10.9750/PSAS.024.451.461. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6371. Acesso em: 24 apr. 2024.