《资治通鉴·唐纪·唐纪七十一》
癸酉，高仁厚驻扎德阳，杨师立派遣他的将领郑君雄、张士安占据鹿头关以抗拒高仁厚。
癸酉，高仁厚屯德阳，杨师立遣其将郑君雄、张士安据鹿头关以拒之。
On Gui You, Gao Renhou camped in Deyang, and Yang Shi dispatched his generals Zheng Junxiong and Zhang Shi'an to occupy Lukou Pass to resist Gao Renhou.