Korovushkin Petr V., Chirsheva Galina N. «Mixed speech of bilingual children in a Russian family» // Tomsk State University Journal of Philology 2017. №48 C.84-97
Chirsheva Galina N., Korovushkin Petr V. «Code-Switches in the Speech of Five-Year-Old Bilingual Children» // Tomsk State University Journal of Philology 2021. №71 C.169-184