GIBSON, W G; STUART, John. Notes on Ancient Pipe-Heads - ’Elfin Pipes.’. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 9, p. 288–291, 1872. DOI: 10.9750/PSAS.009.288.291. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5487. Acesso em: 26 apr. 2024.