DEGRAAF, M.; LEVIN, B. Preface. Journal of Mathematics Education at Teachers College, [S. l.], v. 6, n. 1, 2015. DOI: 10.7916/jmetc.v6i1.602. Disponível em: https://journals.library.columbia.edu/index.php/jmetc/article/view/602. Acesso em: 26 apr. 2024.