《北史·列传·卷六十九》
李同轨死后，又征召中山人张周彡武、渤海人李铉、中山人石曜等人相继作为各位王子的师友。
同轨云亡，复征中山张雕武、勃海李铉、刁柔、中山石曜等递为诸子师友。
After Li Tonggui's death, people from Zhongshan Zhang Zhoumianwu, Li Xuan from Bohai, Shi Yao from Zhongshan and others were recruited as teachers and friends of various princes.