Goryaynova, Viktoriya, and Ilya Akishin. “Efficiency of School Activity and Socio-Economic Characteristic of students’ Families: Are They Connected?”. Voprosy obrazovaniya / Educational Studies Moscow, no. 1 (December 31, 2010): 151-189. Accessed July 15, 2026. https://vo.hse.ru/article/view/15320.