UCHECHI EZINWANY, I. DIFFERENTIAL ITEM FUNCTIONING OF 2020-2021 NIGERIAN BASIC EDUCATION CERTIFICATE EXAMINATION MULTIPLE CHOICE QUESTIONS IN MATHEMATICS IN ABIA STATE. UNIZIK Journal of STM Education, [S. l.], v. 6, n. 1, p. 1–13, 2023. Disponível em: https://journals.unizik.edu.ng/jstme/article/view/2828. Acesso em: 12 may. 2024.