@book{Kallisratidis2021m-learning, author={Kallisratidis, E.V. and Korostova, S.V. and Nefedov, I.V. and Panteleev, A.F. and Tretyakova, A.Y. and Frolova, O.A.}, title={M-learning in project activities when teaching Russian as a foreign language}, publisher={Publishing Center RIOR}, year={2021}, pages={88}, }