HANNAH, Ian C. The Castles of Ravensnook and Uttershill, Midlothian. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 62, p. 232–239, 1928. DOI: 10.9750/PSAS.062.232.239. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7726. Acesso em: 8 may. 2024.