ÖZYILDIRIM-GÜMÜŞ, Feride; ŞAHINER, Yeter. Investigation on how pre-service elementary mathematics teachers write and use mathematical definitions. International Electronic Journal of Elementary Education, [S. l.], v. 9, n. 3, p. 523–552, 2017. Disponível em: https://www.iejee.com/index.php/IEJEE/article/view/174. Acesso em: 4 aug. 2026.