ARMITAGE, Ella Sophia. Anglo-Saxon Burhs and Early Norman Castles. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 34, p. 260–288, 1900. DOI: 10.9750/PSAS.034.260.288. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/6776. Acesso em: 23 apr. 2024.