JUNI SAHFITRI; FIRMANSYAH; DWI NOVITA SARI. Exploration Ethnomatematics in Musical Instruments Gordang Nine with Theory Geometry Two Dimensions and Three Dimensions. International Journal of Educational Research Excellence, [S. l.], v. 1, n. 2, p. 187–192, 2022. DOI: 10.55299/ijere.v1i2.214. Disponível em: https://ejournal.ipinternasional.com/index.php/ijere/article/view/214. Acesso em: 10 feb. 2026.