《新唐书·本纪·卷四·则天皇后 中宗》
十月二十二日，文昌右丞李元素任凤阁侍郎，右肃政台御史中丞周允元任检校凤阁侍郎，并加同凤阁鸾台平章事。
十月壬申，文昌右丞李元素为凤阁侍郎，右肃政台御史中丞周允元检校凤阁侍郎：同凤阁鸾台平章事。
On the 22nd day of the tenth month, Li Yuansu, the Right Vice Premier of Wenchang, was appointed the Imperial Secretary of the Phoenix Pavilion, and Zhou Yunyuan, the Right Zhongcheng of the Right 肃政台, was appointed the Inspector of the Phoenix Pavilion, and they were both added the position of Sharing the Authority of Minister of Phoenix Pavilion and鸾台.