《资治通鉴·汉纪·汉纪四十六》
兖州刺史第五种派从事卫羽调查审问，查出赃款五六千万钱。第五种立即上奏告发单匡，并弹劾单超。
兗州刺史第五种使从事卫羽案之，得臧五六千万，种即奏匡，并以劾超。
The Inspector of Yuzhou, Diwu Zhong, sent Prefect Wei Yu to investigate and interrogate him, finding 560 or 570 million in illicit funds. Diwu Zhong immediately submitted a memorial to impeach Shan Kuang, and also Shan Chao.