Supardi, Aulia Khairunnisa, et al. “Effectiveness of PMRI Assisted by VERULI on Elementary School Students’ Mathematical Problem-Solving Skills”. Kognitif: Jurnal Riset HOTS Pendidikan Matematika, vol. 6, no. 3, July 2026, pp. 1073-94, doi:10.51574/kognitif.v6i3.5312.