Nainggolan, Susy Irawaty, et al. “Development of Ispring-Assisted Interactive Learning Media to Support Students Self-Regulated Learning on Flat-Sided Geometric Solids”. Jurnal Absis: Jurnal Pendidikan Matematika Dan Matematika, vol. 8, no. 1, Apr. 2025, pp. 70-82, doi:10.30606/absis.v8i1.2661.