ARDIANSARI, Lia. Pra-Aljabar: Langkah Baru Mengajar Aljabar Awal (Penerapan Didactical Design Research). Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika, [S. l.], v. 1, n. 1, p. 32–44, 2018. Disponível em: https://www.e-journal.my.id/proximal/article/view/182. Acesso em: 8 jul. 2025.