Tsonev П. Possible Scoring of the Open-ended Items from the National External Assessment after Grade VII in 2023, based on on Item Response Theory. Mathematics and Education in Mathematics, [S. l.], v. 53, p. 161–168, 2024. DOI: 10.55630/mem.2024.53.161-168. Disponível em: https://smb.math.bas.bg/mem/index.php/memjournal/article/view/133. Acesso em: 6 oct. 2026.