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, vol. 6, no. 1, Nov. 2023, pp. 1-13, https://journals.unizik.edu.ng/jstme/article/view/2828.