SIMPSON, D D A; COLES, John M; DENSTON, C B. Excavations at Grandtully, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 120, p. 33–44, 1991. DOI: 10.9750/PSAS.120.33.44. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9378. Acesso em: 24 apr. 2024.