CHRISTIE, Alexander. The Style of Ornament which prevailed from the Fourth to the Twelfth Century. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 1, p. 67–69, 1852. DOI: 10.9750/PSAS.001.67.69. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/3914. Acesso em: 8 may. 2024.