Nurhayati, Nunu, et al. “Development of a Desmos-Assisted Flipbook E-Module to Improve Mathematical Problem-Solving Ability: -”. Kognitif: Jurnal Riset HOTS Pendidikan Matematika, vol. 5, no. 4, Dec. 2025, doi:10.51574/kognitif.v5i4.3546.