参考文献: - A world of rings, Anne van Cutsem, SKIRA, 2000, p.146 - Jewellery from the Orient, Treasures from the Bir collection, Wolf-Dieter Seiwert, ARNOLDSCHE, 2009, p.143
参考文献: - A world of rings, Anne van Cutsem, SKIRA, 2000, p.146 - Jewellery from the Orient, Treasures from the Bir collection, Wolf-Dieter Seiwert, ARNOLDSCHE, 2009, p.143