AHMAD, I.; RAUF, A.; KHAN, M. A Comparative Study of Anti-rectangular AG-groupoids and Commutative Semigroups. The Nucleus, [S. l.], v. 57, n. 1, p. 21–26, 2020. DOI: 10.71330/thenucleus.2020.1131. Disponível em: http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/1131. Acesso em: 15 mar. 2025.