GALARZA, P.; GRAY, P. Preface. Journal of Mathematics Education at Teachers College, [S. l.], v. 9, n. 2, 2018. DOI: 10.7916/jmetc.v9i2.582. Disponível em: https://journals.library.columbia.edu/index.php/jmetc/article/view/582. Acesso em: 15 aug. 2022.