Alexander Kazhdan, "Rūm" The Oxford Dictionary of Byzantium (Oxford University Press, 1991), vol. 3, p. 1816. Paul Wittek, Rise of the Ottoman Empire, Royal Asiatic Society Books, Routledge (2013), p. 81: "This state too bore the name of Rûm, if not officially, then at least in everyday usage, and its princes appear in the Eastern chronicles under the name 'Seljuks of Rûm' (Ar.: Salâjika ar-Rûm). A. Christian Van Gorder, Christianity in Persia and the Status of Non-muslims in Iran p. 215: "The Seljuqs called the lands of their sultanate Rum because it had been established on territory long considered 'Roman', i.e. Byzantine, by Muslim armies."
