ELLISON, J. “Before Defended Walls”: Hill-forts and Fortified Sites in northern Eriador in the Second and Third Ages. Mallorn: The Journal of the Tolkien Society, [S. l.], n. 31, p. 20–28, 1994. Disponível em: https://journals.tolkiensociety.org/mallorn/article/view/189. Acesso em: 20 apr. 2024.