Dhaffah, V. N., Maudy, S. Y. and Putra, M. (2026) “Learning Obstacles in Understanding Pyramid Volume: An Epistemological and Didactical Analysis within the Didactical Design Research Framework”, Jurnal Didactical Mathematics, 8(2), pp. 345–370. doi: 10.31949/dm.v8i2.18713.