Najahah, V., & Pujianto, U. (2026). Automatic Classification of Artificial Intelligence Generated Question Difficulty Levels: Klasifikasi Otomatis Tingkat Kesulitan Soal Hasil Kecerdasan Buatan. Indonesian Journal of Innovation Studies, 27(1), 10.21070/ijins.v27i1.1880. https://doi.org/10.21070/ijins.v27i1.1880