SUGIARNI, Rani; HERMAN, Tatang; SURYADI, Didi; PRABAWANTO, Sufyani; JUSNIANI, Nia. Learning obstacle of proportion learning based on proposional reasoning level: A case study pre-service mathematics teachers. Jurnal Elemen, [S. l.], v. 11, n. 1, p. 87–107, 2025. DOI: 10.29408/jel.v11i1.27418. Disponível em: https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/27418. Acesso em: 6 jun. 2025.