MACRAE, Donald. Notice of some Unrecorded Sculptured Stones at Edderton, Ross-shire, and at Foss, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 45, p. 398–402, 1911. DOI: 10.9750/PSAS.045.398.402. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7203. Acesso em: 4 may. 2024.