Full Transformation Semigroup of A Free Left S-Act on N-Generators. Iraqi Journal of Science, [S. l.], v. 63, n. 5, p. 2194–2202, 2022. DOI: 10.24996/ijs.2022.63.5.32. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5914.. Acesso em: 4 may. 2024.