《资治通鉴·唐纪·唐纪七十一》
李克用虽然多次进呈表文请求投降，可是他占据忻州、代州，经常入侵抢掠并州、汾州，并争夺楼烦监。
李克用虽累表请降，而据忻、代州，数侵掠并、汾，争楼烦监。
Li Keyong repeatedly submitted pleas of surrender, but he occupied Xinzhou and Daizhou, often crossed the border to pillage Bingzhou and Fen州, and fought for control of Loufan Monitor.