DUKE, William. Notice of a Recumbent Hog-Backed Monument, and Portions of Sculptured Slabs with Symbols, recently discovered at St Vigeans Church, Forfarshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 22, p. 143–146, 1888. DOI: 10.9750/PSAS.022.143.146. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6291. Acesso em: 3 may. 2024.