THOMAS, F W L. What is a Pennyland? Or Ancient Valuation of Land in the Scottish Isles. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 18, p. 253–285, 1884. DOI: 10.9750/PSAS.018.253.285. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6104. Acesso em: 25 apr. 2024.