PIGGOTT, Stuart. Excavation of the Dalladies long barrow, Fettercairn, Kincardineshire. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 104, p. 23–47, 1974. DOI: 10.9750/PSAS.104.23.47. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8809. Acesso em: 2 may. 2024.