《宋史·列传·卷四十九》
曹利用生性勇悍，但很少圆通，致力于裁制侥幸小人，但他的亲朋旧友中却有人因他的关系而当官升职。他因此遭受祸患。但他在朝廷中能尽忠职守，始终不屈服，无罪而死，天下人都说他冤枉。杨崇勋，字宝臣，蓟州人。
久之，为定州路钤辖，进马步军总管，徙真定、大名府路。历知代、沧、澶、郑、相州，终雄州团练使。杨崇勋，字宝臣，蓟州人。
Cao Shiyong was brave and warlike by nature but somewhat lacking in diplomacy, and although he devoted himself to curbing unscrupulous and opportunistic individuals, there were still many of his friends and relatives who relied on his influence to gain official positions and promotions, which led to his eventual misfortune. However, he was able to fulfill his duties in the imperial court with unwavering loyalty and died an innocent man, causing the world to lament his grievance. Yang Chonghun, styled Baoshen, was from Jizhou.