ANDERSON, Joseph. Note on a Group of Perforated Stone Hammers, remarkable for their Similarity of Form and Ornamentation. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 43, p. 377–384, 1909. DOI: 10.9750/PSAS.043.377.384. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7161. Acesso em: 27 may. 2024.