《南史·列传·卷六十三》
他的堂哥兖州刺史羊敦暗中知道了，便以所占州城抗拒羊侃，羊侃率领精兵三万袭击兖州，未能攻克，就修建十多座城垒来防守。
其从兄兖州刺史敦密知之，据州拒侃，侃乃率精兵三万袭之，不克，仍筑十馀城以守之。
His cousin, Yan Zhou Prefect Yang Dun, secretly found out about it and so barricaded himself in the towns within his prefecture in order to resist Yang Kan. Yang Kan led an elite force of 30,000 to attack Yan Zhou but, failing to capture it, constructed more than ten forts to secure his position.