Salma, A., N. Putri, D. Viqtorinnada, and A. Ardiansyah. “Literature Study of Discovery Learning-Based Worksheets for Students’ Concept Understanding Skills on Numbers Material”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 6, Feb. 2023, pp. 87-91, https://journal.unnes.ac.id/sju/prisma/article/view/66498.