On (m,n) (U,R) – Centralizers. Iraqi Journal of Science, [S. l.], v. 56, n. 3B, p. 2364–2367, 2023. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9785.. Acesso em: 7 apr. 2025.