Study on Hypergraphs and Directed Hypergraphs. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 5, n. 10, p. 1–5, 2013. DOI: 10.29070/qpbd9y90. Disponível em: https://ignited.in/index.php/jasrae/article/view/4887.. Acesso em: 8 aug. 2025.