AGUSTITO, D.; KUNCORO, K. S.; ARIF, D. F. Development of Discrete Mathematics Teaching Materials to Improve Critical Thinking Skill Mathematics of Prospective Teacher. Union: Jurnal Ilmiah Pendidikan Matematika, [S. l.], v. 10, n. 3, p. 405–417, 2022. DOI: 10.30738/union.v10i3.13613. Disponível em: https://jurnal.ustjogja.ac.id/index.php/union/article/view/13613. Acesso em: 2 apr. 2023.