Development of the Activity of Learning Geometric Concepts in Younger Adolescents: Social and Cultural Communication. Mediterranean Journal of Social Sciences, [S. l.], v. 6, n. 6, p. 503, 2015. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/7974.. Acesso em: 19 may. 2024.