LIVENS, R G. Petrology of Scottish stone implements. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 92, p. 56–70, 1961. DOI: 10.9750/PSAS.092.56.70. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8575. Acesso em: 23 apr. 2024.