Noening Andrijati, Heri Retnawati, and Sudiyatno. “Analysis of Item Characteristics in Elementary School Mathematics Reasoning Assessment Using Item Response Theory With the Generalized Partial Credit Model”. Educational Administration: Theory and Practice 30, no. 4 (April 21, 2024): 3799–3810. Accessed October 1, 2025. https://kuey.net/index.php/kuey/article/view/2129.