A modern introduction to graphs in secondary education. Training and Practice : Journal of Educational Sciences, [S. l.], v. 15, n. 1-2, p. 275–293, 2017. DOI: 10.17165/TP.2017.1-2.16. Disponível em: https://journal.uni-mate.hu/index.php/trainingandpractice/article/view/4671. Acesso em: 30 jan. 2026.