Pestovs, Pāvels, and Dace Namsone. “INTERPRETING LARGE SCALE NATIONAL LEVEL ASSESSMENT DATA IN MATHEMATICS BY USING RASCH ANALYSIS”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, vol. 3, May 2020, pp. 457-69, https://doi.org/10.17770/sie2020vol3.5118.