BARROW, G W S. The Earls of Fife in the 12th Century. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 87, p. 51–62, 1955. DOI: 10.9750/PSAS.087.51.62. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8431. Acesso em: 7 may. 2024.