Gabitov, Azat, Marina Solnyshkina, Liliya Shayakhmetova, Liliya Ilyasova, y Saida Aкbarova. 2017. «Text Complexity In Russian Textbooks On Social Studies». Revista Publicando 4 (13 (2). "Quito, Ecuador":597-606. https://revistapublicando.org/revista/index.php/crv/article/view/919.