GRAHAM, Angus. Cairnfields in Scotland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 90, p. 7–23, 1959. DOI: 10.9750/PSAS.090.7.23. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8517. Acesso em: 1 may. 2024.