KURT-BIREL, G.; DENIZ, Şule; ÖNEL, F. Analysis of Primary School Teachers’ Knowledge of Geometry. International Electronic Journal of Elementary Education, [S. l.], v. 12, n. 4, p. 303–309, 2020. Disponível em: https://iejee.com/index.php/IEJEE/article/view/1053. Acesso em: 17 oct. 2021.