Knüppel 2000: "Next to Qašqāʾi and Äynallu, Sonqori is worth mentioning as another dialect of the Southern-Oghuz group." Knüppel, Michael (2000). "TURKIC LANGUAGES OF PERSIA: AN OVERVIEW". In Yarshater, Ehsan (ed.). Encyclopædia Iranica, Online Edition. Encyclopædia Iranica Foundation. Retrieved 14 February 2023.