FISHER, Ian; GREENHILL, F A. Two unrecorded carved stones at Tower of Lethendy, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 104, p. 238–241, 1974. DOI: 10.9750/PSAS.104.238.241. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8816. Acesso em: 18 apr. 2024.