FEACHEM, Richard W. Castlehill Wood Dun, Stirlingshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 90, p. 24–51, 1959. DOI: 10.9750/PSAS.090.24.51. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8518. Acesso em: 1 may. 2024.