MAJEED, Taghreed Hur. Some New Characteristics of Topological Ring-Groupoids. Iraqi Journal of Science, [S. l.], v. 67, n. 1, p. 419–427, 2026. DOI: 10.24996/ijs.2026.67.1.35. Disponível em: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/13946.. Acesso em: 7 jun. 2026.