《北史·列传·卷二》
尚书令杨等接受遗诏以辅政，却疏远和忌恨各亲王，太皇太后便秘密地和孝昭帝以及众大将定计杀掉他，下令废除高殷的帝位。
尚书令杨愔等受遗诏辅政，疏忌诸王。太皇太后密与孝昭及诸大将定策诛之，下令废立。
Minister of War Yang and others accepted the edict to assist in government, but they alienated and resented the many princes. The empress dowager secretly conspired with Emperor Xiaozhao and a large number of generals to kill him and ordered the abolishment of Gao Yin's imperial position.