Setyaningrum, A., M. Mulyono, and I. Rosyida. “Mathematical Problem-Solving Ability in Terms of Learning Independence in Problem Based Learning With E-Scaffolding.”. Unnes Journal of Mathematics Education Research, Vol. 11, no. 1, June 2022, pp. 108-13, https://journal.unnes.ac.id/sju/ujmer/article/view/63731.