NOTO, M. S.; PRIATNA, N.; DAHLAN, J. A. Mathematical proof: the learning obstacles of pre-service mathematics teachers on transformation geometry. Journal on Mathematics Education, [S. l.], v. 10, n. 1, p. 117–126, 2019. Disponível em: https://jme.ejournal.unsri.ac.id/index.php/jme/article/view/3781. Acesso em: 7 jul. 2025.