“The Effectiveness of the Use of Belajar.Id Form Applications in the Preparation of Digital-Based Numeracy Questions for Mathematics Subject Educators at Smp Negeri 15 Surakarta” (2022) Zien Journal of Social Sciences and Humanities, 14, pp. 16–23. Available at: https://mail.zienjournals.com/index.php/zjssh/article/view/2687 (Accessed: 14 October 2025).