WULANDARI, E. .; AYDA, E. Analysis of Open-Ended Based Mathematics Learning Tools Oriented to Higher Order Thinking Skills Viewed from the Aspect of Validity. Edumatica : Jurnal Pendidikan Matematika, [S. l.], v. 11, n. 03, p. 32-39, 2021. DOI: 10.22437/edumatica.v11i03.14404. Disponível em: https://online-journal.unja.ac.id/edumatica/article/view/14404. Acesso em: 22 jul. 2024.