Alòs i FontH. and Tovar-GarcíaE. 2018. Trilingualism, Bilingualism and Educational Achievements: The Case of Chuvash and Tatar in Rural Russia. Voprosy obrazovaniya / Educational Studies Moscow. 3 (Sep. 2018), 8-35. DOI:https://doi.org/10.17323/1814-9545-2018-3-8-35.