SÜMEN, Özlem Özçakır. Primary school students’ abstraction levels of whole-half-quarter concepts according to RBC theory. Journal on Mathematics Education, [S. l.], v. 10, n. 2, p. 251–264, 2019. Disponível em: https://jme.ejournal.unsri.ac.id/index.php/jme/article/view/3792. Acesso em: 29 jul. 2025.