《资治通鉴·唐纪·唐纪七十一》
政锋秉承旨意，任命李克用为东北面行营都统，杨复光为东面都统监军使，陈景思为北面都统监军使。
揆，巢之弟也。王鐸承制以克用为东北面行营都统，以杨复光为东面都统监军使，陈景思为北面都统监军使。
Zhengfeng followed the instructions and appointed Li Keyong as the Commander-in-Chief of the  Expeditions in the Northeast, Yang Fuguang as the Governor-General and Supervisor of the Military of the Eastern Front, and Chen Jingsai as the Governor-General and Supervisor of the Military of the Northern Front.