WIDJAJA, W.; VALE, C. COUNTEREXAMPLES: CHALLENGES FACED BY ELEMENTARY STUDENTS WHEN TESTING A CONJECTURE ABOUT THE RELATIONSHIP BETWEEN PERIMETER AND AREA. Journal on Mathematics Education, [S. l.], v. 12, n. 3, p. 487–506, 2021. Disponível em: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/3648. Acesso em: 19 apr. 2025.