EDWARDS, Arthur J H. Rock Sculpturings on Traprain Law, East Lothian. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 69, p. 122–137, 1935. DOI: 10.9750/PSAS.069.122.137. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7936. Acesso em: 7 may. 2024.