Agajanov, S.G. "The States of the Oghuz"History of Civilizations of Central Asia, Volume IV: The Age of Achievement AD 750 to the End of the Fifteenth Century. Motilal Banarsidass. pp. 61–76
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Jiu Tangshu215b Helu txt. "統處月、處蜜、姑蘇、歌邏祿、弩失畢五姓之眾" tr. "(Helu) governed the mass, [consisting] of the Chuyue, Chumi, Gusu, Geluolu, and Nushibi - five clans-"