MAXWELL, Herbert E. The Crosses of Kirkmadrine: Discovery of the Missing Third Stone. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 51, p. 199–207, 1917. DOI: 10.9750/PSAS.051.199.207. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7413. Acesso em: 18 apr. 2024.