ANDERSON, Joseph. On the Horned Cairns of Caithness, their Structural Arrangement, Contents of Chambers, &c. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 7, p. 480–512, 1867. DOI: 10.9750/PSAS.007.480.512. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5361. Acesso em: 19 apr. 2024.