When Abu'l-Fawaris' brother Sultan al-Dawla became the senior amir of the Buyids in 1012, he appointed Abu'l-Fawaris (thereafter known as Qawam al-Dawla, "Foundation of the State") as governor of Kerman. When Sultan al-Dawla left Fars for Iraq in around 1017, Qawam al-Dawla decided to attack. With the support of the Ghaznavids, he invaded and occupied Fars. A counterattack expelled him from that province, but he managed to retain his hold on Kerman. Sultan al-Dawla died in 1024, and his son Abu Kalijar managed to gain control of Fars. Eventually, Qawam al-Dawla and Abu Kalijar engaged in hostilities against each other; the fighting ceased only when Qawam al-Dawla died in late 1028. He was poisoned; Abu Kalijar took over Kerman.
- Bosworth, C. E. (1975). "Iran under the Buyids". In Frye, R. N. (ed.). The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs. Cambridge: Cambridge University Press. pp. 250–305. ISBN 0-521-20093-8.
- Nagel, Tilman (1990). "BUYIDS". Encyclopaedia Iranica, Vol. IV, Fasc. 6. London u.a.: Routledge & Kegan Paul. pp. 578–586.