Al Kayyis, Abdurrahman, and Mohammad Tohir. “Analysis of Students’ Mathematical Reasoning Abilities Using a Question Development Model Based on 21st-Century Skills”. Proceeding of International Conference of Religion, Health, Education, Science and Technology, vol. 1, no. 1, Sept. 2024, pp. 319-28, doi:10.35316/icorhestech.v1i1.5651.