Dybo A.V., Shestakova D.P. «English and Tuvinian tense systems: similiarities and differences» // Language and Culture 2019. №46 C.24-42
Ilyina L. A. «On diachronically early functions and semantics of the «evidential perfect» in the languages of North Asia» // Siberian Journal of Philology 2015. №2 C.95-104
