Stumbrienė, Dovilė, Rimantas Želvys, Julius Žilinskas, and Audronė Jakaitienė. 2022. “Using PIRLS and TIMSS Data for the Assessment of Efficiency and Effectiveness of Primary Education in Post-Socialist and Old Democracy EU Member States”. Lithuanian Journal of Statistics 61 (December): 1-15. https://doi.org/10.15388/LJS.2022.29667.