ZUBAIRU∗†, M. .; ALI, B. On the nilpotents of the semigroup of partial contractions of a finite chain. International Journal of Mathematical Analysis and Modelling, [S. l.], v. 7, n. 2, 2024. Disponível em: https://tnsmb.org/journal/index.php/ijmam/article/view/158. Acesso em: 22 jan. 2025.