Martin Theodoor Houtsma, 1911 Encyclopædia Britannica (1911)
“ Kilij Arslān lived two years longer, finally under the protection of his youngest son, Kaikhosrau, who held the capital after him (till 1199) until his elder brother, Rukneddin Suleimān, after having vanquished his other brothers, ascended the throne and obliged Kaikhosrau to seek refuge at the Greek emperor's court. This valiant prince saved the empire from destruction and conquered Erzerūm, which had been ruled during a considerable time by a separate dynasty, and was now given in fief to his brother, Mughīt ud-dīn Toghrul Shāh. ”
