SUDARSONO, Sudarsono; BAETI, Nur; SARTIKA, Dewi. Reconstructing Geometric Concepts through Uma Lengge: An Ethnomathematics-Based Design Study to Enhance Students’ Contextual Problem-Solving Skills. Formatif : Jurnal Ilmiah Pendidikan MIPA, Jakarta, Indonesia, v. 16, n. 2, p. 319–334, 2026. DOI: 10.30998/formatif.v16i2.3425. Disponível em: https://newjournal.lppmunindra.ac.id/index.php/formatif/article/view/3425. Acesso em: 16 oct. 2026.