↑(en) V. Minorsky, "Tat" in M. Th. Houtsma et al., eds., The Encyclopædia of Islam: A Dictionary of the Geography, Ethnography and Biography of the Muhammadan Peoples, 4 vols. and Suppl., Leiden: Late E.J. Brill and London: Luzac, 1913–38.
↑(en) V. Minorsky, "Tat" in M. Th. Houtsma et al., eds., The Encyclopædia of Islam: A Dictionary of the Geography, Ethnography and Biography of the Muhammadan Peoples, 4 vols. and Suppl., Leiden: Late E.J. Brill and London: Luzac, 1913–38. Excerpt: Like most Persian dialects, Tati is not very regular in its characteristic features"
↑(en) C Kerslake, Journal of Islamic Studies (2010) 21 (1): 147-151. excerpt:"It is a comparison of the verbal systems of three varieties of Persian—standard Persian, Tat, and Tajik—in terms of the 'innovations' that the latter two have developed for expressing finer differentiations of tense, aspect and modality..." [1]
↑(en) Borjian, Habib, "Tabari Language Materials from Il'ya Berezin's Recherches sur les dialectes persans", Iran and the Caucasus, Volume 10, Number 2, 2006, pp. 243-258(16). Excerpt:"It embraces Gilani, Ta- lysh, Tabari, Kurdish, Gabri, and the Tati Persian of the Caucasus, all but the last belonging to the north-western group of Iranian language."