SMALL, Alan; BATESON, J D. Some possible dating evidence for a souterrain near Alyth, Perthshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 125, p. 673–676, 1996. DOI: 10.9750/PSAS.125.673.676. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9899. Acesso em: 8 may. 2024.