Rezigalla, Assad, Ali Eleragi, Masoud Elkhalifa, and Ammar Mohammed. 2020. “Comparison Between students’ Perception and Examination Validity, Reliability and Items Difficulty: A Cross-Sectional Study ”. Sudan Journal of Medical Sciences (SJMS) 15 (2), 114–123. https://doi.org/10.18502/sjms.v15i2.5503.