Gilanshah

Gilanshah (Persian: گیلانشاه) was the last ruler of the Ziyarid dynasty from ca. 1087 to 1090. He was the son and successor of Keikavus. Little is known about Gilanshah; his kingdom was invaded by the Nizari Ismaili state in 1090, ending Ziyarid rule in Tabaristan.

• Madelung, W. (1975). "The Minor Dynasties of Northern Iran".In Frye, R. N. (ed.). The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs. Cambridge: Cambridge University Press. pp. 198–249. ISBN 978-0-521-20093-6.CS1 maint: ref=harv (link)
• Bosworth, C. E. (1968). "The Political and Dynastic History of the Iranian World (A.D. 1000–1217)".In Frye, R. N. (ed.). The Cambridge History of Iran, Volume 5: The Saljuq and Mongol periods. Cambridge: Cambridge University Press. pp. 1–202. ISBN 0-521-06936-X.CS1 maint: ref=harv (link)