TAKÁCS KLINGNÉ, A.; SZIGETI, M. Graphs in the teaching of the analysis and in assessment. Regional and Business Studies, [S. l.], v. 1, n. 1, p. 57–63, 2009. Disponível em: https://journal.uni-mate.hu/index.php/rbs/article/view/422. Acesso em: 29 nov. 2021.