Tyas, N. M., T. P. Rahayu, S. Sutrisno, and S. Muati. “Understanding Elementary Students’ Mathematics Learning Difficulties: A Qualitative Analysis of Internal and External Factors ”. Interval: Indonesian Journal of Mathematical Education, Vol. 3, no. 2, Dec. 2025, pp. 146-58, doi:10.37251/ijome.v3i2.2512.