Topological Structures on Vertex Set of Digraphs. Baghdad Science Journal, Iraq, Baghdad, v. 20, n. 1(SI), p. 0350, 2023. DOI: 10.21123/bsj.2023.8432. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/8432.. Acesso em: 28 apr. 2024.