MACLAGAN, C; STUART, John. On the Round Castles and Ancient Dwellings of the Valley of the Forth, and its Tributary the Teith. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 9, p. 29–44, 1872. DOI: 10.9750/PSAS.009.29.44. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5495. Acesso em: 13 jun. 2024.