UTARI OKTAVIANI; RAHMAWATI, F.; PAMUNGKAS, M. D. Development of sign language videos to improve mathematical communication of deaf students of fractional material. Union: Jurnal Ilmiah Pendidikan Matematika, [S. l.], v. 11, n. 2, p. 167–175, 2023. DOI: 10.30738/union.v11i2.12534. Disponível em: https://jurnal.ustjogja.ac.id/index.php/union/article/view/12534. Acesso em: 17 apr. 2024.