Vlada, N., O. Cherdyntseva, y E. Polyanskaya. «Pre-University Education in Terms of Promoting Russian Education on the World Education Market». Propósitos Y Representaciones, vol. 9, n.º SPE3, abril de 2021, p. e1411, https://revistas.usil.edu.pe/index.php/pyr/article/view/1411.