BRASH, Richard Rolt. The Round Tower of Abernethy: with drawings. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 3, p. 303–319, 1862. DOI: 10.9750/PSAS.003.303.319. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/4529. Acesso em: 25 apr. 2024.