《资治通鉴·梁纪·梁纪十五》
西魏无力讨伐他，便任命邓彦为瓜州刺史。但多次征召他，他都不来，又与南面的吐谷浑勾结。
魏不能讨，因以彦为刺史，屡征不至，又南通吐谷浑。
Western Wei unable to punish him, he was appointed as governor of Gua Prefecture Deng Yan. But many times summoned to him, he never came, and it is also hooked up with the south of the Tuoba Hun.