Martínez-Garrido, C., N. Siddiqui, and S. Gorard. “Longitudinal Study of Socioeconomic Segregation Between Schools in the UK”. REICE. Ibero-American Journal on Quality, Effectiveness and Change in Education, vol. 18, no. 4, Sept. 2020, pp. 123-41, doi:10.15366/reice2020.18.4.005.