SHEPHERD, Ian A G; BRUCE, Margaret F. Two beaker burials from Keabog, Pitdrichie, near Drumlithie, Kincardine and Deeside. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 117, p. 33–40, 1988. DOI: 10.9750/PSAS.117.33.40. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/9296. Acesso em: 4 may. 2024.