《资治通鉴·唐纪·唐纪七十五》
给事中牛徽说： 先朝皇帝多灾多难，李茂贞当即派出军队攻伐征讨，他的意向就在于痛恨杨复恭一伙奸恶小人，但是不应当不等待朝廷的诏命就行动。
给事中牛徽曰： 先朝多难，茂贞诚有翼卫之功；诸杨阻兵，亟出攻讨，其志亦在疾恶，但不当不俟诏命耳。
Niu Wei, the Palace Attendant, said: “The late emperor faced many disasters. Li Maozhen immediately sent troops to attack and punish, and his intention was to detest the traitorous villains like Yang Fugong, but it was not right for him to act without waiting for an imperial order.”